3IO DISCOVERY REPORTS 



which Brauer (1908) called a ' linsen polster ' and which is shown on his pi. 40, figs. 2 and 5, of Dissomma 

 a nale. 



Table 1 shows the number of fin-rays in Neoscopelarchoides dubias compared with the other known 

 species of this genus. 



N. dubius is also readily distinguishable from the other species by the highly developed pelvic fins. 

 The proportions of the latter expressed in hundredths of the standard length are : N. dubias, 29-0 ; 

 N. elongatus, 13-3-14-4; N. linguidens, 5-3-5-6; N. dentatus, c. 17-0 (measured from Chapman's (1939) 

 figure). 



Note. I have called this species dubius, because it is possible that future work may reveal it to be 

 the adult of the larval form, Benthalbella infans Zugmayer (see p. 312). 



Table 1 



Neoscopelarchoides elongatus (Norman) 

 (Text-fig. 3b, V and PI. XIX, figs. 1, 2.) 

 Scopelarchus elongatus Norman 1937. Rep. B.A.N.Z. Antarct. Res. Exped. 1929-193 1 (B), 1 (2), p. 86. 



As the original description by Norman (1937) is rather brief, an expanded one is given here. It is 

 based on the type specimen (standard length 198 mm.) which was taken east of Kerguelen Island 

 (45° 53' S, 84° 33' E) and on two individuals taken by R.R.S. ' Discovery II '. The first (s.l. 104 mm.) 

 is from station 391 (55 48^' S, 52 35' W), about 300 miles south-east of the Falkland Islands, in a 

 450 cm. net hauled between 1200 m. and 1300 m.; date, 18. iv. 30 (Text-fig. 3). The second (s.l. 

 1 20 mm.) is from station 725 (53 23-6' S, 74 57-8' W), about 50 miles south of the western end of the 

 Magellan Strait, in a 100 cm. net hauled obliquely between 250 m. and 196 m.; date 17. xi. 31 (PI. XIX, 

 figs. 1, 2). 



In the following description the data for the type 1 are given first, followed (in parenthesis) by the 

 data for the Discovery specimens, in the above-mentioned order. 



Body proportions in hundredths of the standard length 198 mm. (104 and 120 mm.). Greatest depth of 

 body 14-1 (n-i, io-8); length of head 19-8 (22-1, 22-5); horizontal diameter of eye 5-6 (5-3, 5-8); 

 length of snout 6-i (7-2, 7-9); width of bony interorbital i-6 (i-6, 1-5); length of lower jaw (20-2, 20-0); 

 maxilla (17-3, 16-6); length from tip of snout to origin of dorsal fin 39-1 (42-8, 41-7); snout to adipose 

 dorsal fin 79-9 (74-0, 75-0); snout to pectoral fin 21-7 (24-0, 23-3); snout to pelvic fin 37-9 (40-4, 38-3); 

 snout to anal fin 64-6 (65-4, 64-2); length of pectoral fin (14-4, 13-3); length of pelvic fin (14-4, 13-3); 

 depth of caudal peduncle 7-1 (6-2, 6-o); length of caudal peduncle 12-6 (12-5, 12-8). 



Fin-rays. D. 9 (9, 8), A. 26 (27, 27) Pect. 22 (21, 21), Pv. 9 (9, 9). 



Scaling. (Based on the Discovery specimen from station 725.) Small, thin cycloid scales on cheeks 

 and gill covers and over the rest of the body. Scales of lateral line much enlarged. 



Scales along lateral line 64. Transverse rows of scales between origin of dorsal fin and lateral line 8 ; 

 between origin of anal fin and lateral line 10- 11 (the type specimen has sixty-two scale pockets along 

 the lateral line). 



Vertebrae. In the type specimen: 61. 



1 Owing to damage, certain measurements for the type specimen had to be omitted. 



