3C 35 Low-resolution maps of this source at 408MHz and 1.4GHz are shown in 3C 35 Mackay (1969MNRAS.145...31M); there is no unresolved structure 3C 35 brighter than 10mJy at 5GHz in the region of the north component or in 3C 35 the region of the associated galaxy. The first optical object is a 3C 35 14.5mag galaxy with a redshift of 0.0677 and the second is a 17mag 3C 35 neutral stellar object. 3C 43 The source is identified with a QSO of 20 mag on the PSS print; this 3C 43 QSO is optically variable (Sandage, 1966ApJ...144.1234S). 3C 49 The source is identified with a 22 mag object, probably a galaxy 3C 49 (Kristian et al., 1974ApJ...191...43K, Longair & Gunn, 3C 49 1975MNRAS.170..121L). 3C 76.1 There is no unresolved structure brighter than 10mJy. The first optical 3C 76.1 object is a 15mag DE3 galaxy of redshift 0.0328; the second is a 3C 76.1 15.5mag neutral stellar object. A low-resolution map at 1.4GHz is 3C 76.1 shown in MacDonald et al., 1968MNRAS.138..259M. 3C190 The source is identified with a 20mag object. 3C191 The source is identified with an 18mag quasar. 3C216 The angular size was derived from the visibility function on the 3C216 assumption that the source is double; the derived pa is 62{deg}. The 3C216 source is identified with an 18mag quasar. 3C241 This source is not identified. 3C243 Due to the low declination of this source no information can be 3C243 obtained about its angular size in DE, nor can an accurate 3C243 determination of its position in dec be made; the DE quoted is due to 3C243 Wills & Bolton (1969AuJPh..22..775W). The source is identified with an 3C243 18.3mag quasar; it is not in the revised 3C catalogue and is also 3C243 called 4C 06.40. 3C264 The structure of this large source has been discussed by Northover 3C264 (1976MNRAS.177..307N); only the compact central radio component has 3C264 been listed in the Table. The optical objects listed are (a) 14mag 3C264 elliptical galaxy and (b) 12.7mag elliptical galaxy NGC 3862 with a 3C264 redshift of 0.0206. 3C282 The angular size was derived from the visibility function on the 3C282 assumption that the source is double; the derived PA is 120{deg}. The 3C282 optical position in the Table is that of the 20mag galaxy suggested 3C282 as an identification by Wills (1967MNRAS.135..339W); it seems 3C282 unlikely that this is related to the source. This source is not in 3C282 the revised 3C catalogue; it is also known as 4C 65.14. 3C285 A low-resolution map of this source at 1.4GHz is shown in MacDonald et 3C285 al., 1968MNRAS.138..259M. There is no unresolved structure at 5GHz 3C285 brighter than 10mJy. The optical object is a 16mag galaxy. 3C303.1 The first optical position, which is in good agreement with the radio 3C303.1 position, is that of a 19 mag red object; the second optical position 3C303.1 is that of an 18mag galaxy previously suggested as an identification 3C303.1 by Wyndham (1966ApJ...144..459W). 3C310 The first three optical objects lie in a common envelope; they are 3C310 (a) a 16mag galaxy, (b) a 15mag galaxy (galaxy 1 of Griffim 3C310 (1963AJ.....68..421G)) which has a redshift of 0.053 and is 3C310 coincident with the compact central radio component and (c) a 15mag 3C310 galaxy (galaxy 2 of Griffin). The fourth object is also a 15mag 3C310 galaxy. There is no unresolved structure other than the central 3C310 component brighter than 20mJy. A low-resolution map at 1.4GHz is 3C310 shown in Mackay (1969MNRAS.145...31M). 3C314.1 There is no unresolved structure brighter than 10mJy. The first 3C314.1 optical object is an 18 mag red object, the second is a 17mag galaxy. 3C314.1 A low-resolution map at 1.4GHz is shown in Mackay 3C314.1 (1969MNRAS.145...31M). 3C315 The structure of this large source has been discussed in detail by 3C315 Northover (1976MNRAS.177..307N); only the compact central radio 3C315 component has been listed in the Table. The optical objects listed 3C315 are two 17mag galaxies; the northern galaxy has a redshift of 0.1086. 3C321 Observations were made with the Cambridge One-Mile telescope (Elsmore, 3C321 Kenderdine & Ryle, 1966MNRAS.134...87E) at 408MHz. Four 3C321 interferometer spacings were used in the synthesis and the response 3C321 was a pencil beam with half-power beamwidths of 80arcsec in RA and 3C321 200arcsec in DE. The details of the components are listed below using 3C321 the same notation as for Table 1. 3C321 Component Flux 3C321 RA_B1950 +/- Dec_B1950 +/- pa omega_1 _2 density 3C321 h m s s s d ' " " {deg} " " mJy +/- 3C321 15 29 25.9 0.5 +24 16 00 20 130 180 <100 2000 200 3C321 15 29 40.7 0.5 +24 12 50 20 - < 40 <100 6500 600 3C338 The optical position is the centre of the 12.6mag cD galaxy NGC 6166, 3C338 measured on the PSS print; this galaxy has four nuclei which cannot 3C338 be distinguished on the PSS prints, but whose positions are given by 3C338 Griffin (1963AJ.....68..421G). The compact central radio component is 3C338 coincident with nucleus 1 of Griffin; there is no other unresolved 3C338 structure brighter than 15mJy. A low-resolution map of this source is 3C338 shown in MacDonald et al., 1968MNRAS.138..259M. 3C380 The visibility function indicates that about 18 per cent of the flux 3C380 originates in low-brightness structure on a scale of a few arcsec. 3C380 The associated object is a 17mag quasar. 3C386 There is no unresolved structure brighter than 20mJy. The associated 3C386 object is a 12mag galaxy. A low-resolution map at 1.4GHz is shown in 3C386 Mackay (1969MNRAS.145...31M). 3C442A There is no unresolved structure brighter than 10mJy within a region 3C442A of radius 135 arcsec centred on the associated galaxies. The optical 3C442A objects are (a) 13.8mag galaxy NGC 7236 with redshift 0.0262, 3C442A (b) 14.5mag galaxy NGC 7237 and (c) 16.5mag galaxy. A low-resolution 3C442A map at 408MHz is shown in Mackay (1969MNRAS.145...31M). 3C449 There is no other unresolved structure brighter than 10mJy. The 3C449 optical objects are (a) 12.5mag galaxy with redshift 0.0181 and 3C449 (b) 15mag galaxy. Low-resolution maps at 408 and 1407MHz are shown 3C449 in Mackay (1969MNRAS.145...31M). 3C454 The source is identified with an 18.4 mag quasar. 4C05.34 Due to the low declination of this source, no information can be 4C05.34 obtained about its angular size in DE, nor can an accurate 4C05.34 determination of its position in dec be made; the DE quoted is due 4C05.34 to Wills & Bolton (1969AuJPh..22..775W). The source is identified 4C05.34 with an 18mag quasar. 4C13.39 This source is identified with a 17.5mag quasar. 4C12.39 This source is identified with a 19.2mag quasar. 4C12.46 This source is identified with a 19mag blue object with a featureless 4C12.46 spectrum.