NOTOTHENIIDAE 



33 



Island, at a depth of i metre, identified by Roule, Angel and Despax as A^. nicolai, is 

 135 mm. in total length, and is in very poor condition. Scales are apparently present 

 on the occiput, but not on the interorbital region, and I have little doubt that the 

 specimen should be referred to this species. The British Graham Land Expedition 

 obtained 9 specimens (133 to 230 mm.) from fish traps at approximately 65° S, 65° W, 

 and one specimen (95 mm.) thrown ashore at Barry Island (68° S, 67° W). 



Fig. 18. Trematomus bernacchii. A, Dorsal view of head of T. bernacchii; B, The same of T. vicarius. x |. 



Trematomus vicarius, Lonnberg. 



Trematomus bernacchii subsp. vicarius, Lonnberg, 1905, Wiss. Ergebn. Schwed. Siidpol.-Exped., 



V (6), p. 26. 

 ? Notothenia dubia, Lonnberg, 1905, t.c, p. 28, pi. iii, fig. 9. 

 Trematomus vicarius, Regan, 191 3, t.c, p. 261, fig. 6 B. 



Trematomus dubius, Regan, 1914, Rep. Brit. Antarct. {'Terra Nova') Exped., 1910, Zool. i (i), 

 p. 2. 

 St. 39. 25. iii. 26. East Cumberland Bay, South Georgia. Large otter trawl, 179-235 m.: i 

 specimen, 180 mm. 



Very similar to the preceding species, but length of head 3 J to 3^ in that of fish 

 (without caudal); diameter of eye (3I young) 4! to 4! in length of head; interorbital 

 width about 5 (6^ in young) ; interorbital region naked in young, but with 2 or 3 series 

 of scales in the middle in adult and half-grown specimens. 55 to 59 scales in a longi- 

 tudinal series, (30) 34 to 37 in upper lateral line. Dorsal V, 33-38. Anal 31-32. Pectoral 

 I to I length of head, about as long as pelvics, which just reach the anal. 



Hab. South Georgia. 



The type of T. vicarius, 240 mm. in length without the caudal fin, was taken outside 

 Boiler Harbour, Cumberland Bay, South Georgia, at a depth of 30 metres. This species 

 is very close to T. bernacchii, and may eventually prove to be no more than a local race. 



Notothenia dubia was based upon 3 specimens, 39 to 45 mm. in length without the 

 caudal fin, from the same locality, at a depth of 20 metres ; one of these types was 

 examined by Regan. There can, I think, be little doubt that this form is the young of 

 T. vicarius. Regan has compared the example of 50 mm. with one of T. bernacchii of 

 the same size, and finds that it has a smaller eye, broader interorbital region, and larger 

 scales — exactly the characters used to separate T. bernacchii from T. vicarius. 



