ANTARCTIC FISHES OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 285 



11. Two lateral lines ; outer rays of pelvic fins longest ; dorsal fins separated by 

 an interspace ; lateral line without bony plates . 5. Chsenocephalus. 



III. Three lateral lines. 



Pelvic fins of moderate length 6. Chionodraco. 



Pelvic fins elongate, the rays simple 7. Cryodraco. 



1. Champsocejphalus, GilL 1861. 

 Proc. Acad. Philad., p. 509. 



Body naked, elongate ; 2 lateral lines, without bony plates. Eye nearly in 

 middle of length of head ; no spine on snout. Jaws with rather narrow bands of small 

 sharp teeth, forming only 2 series laterally ; lower jaw not projecting. Gill-rakers 

 short, but well developed on all the branchial arches, dentigerous, about 20 on lower 

 part of anterior arch. Spinous dorsal fin well developed, its base less than \ that of 

 the soft dorsal, with which it is almost continuous ; pelvics comparatively short, with 

 the rays normally branched, the middle ones the longest. 



Patagonia ; Magellan Straits ; South Georgia. 



(1) Champsocephalus esox. (PI. X. fig. 1.) 

 Chasnichthijs esox, Giiiith., Ann. Mag. Nat. Hist. (3), vii., 1861, p. 89. 



Depth of body 7 to 8 in the length, length of head 3 to 3^. Snout a little longer 

 than postorbital part of head. Diameter of eye 7 in the length of head, interorbital 

 width 4 to 5. Supraorbital edges not raised. Maxillary extending to below anterior 

 part or middle of eye. Uppermost opercular spine shorter than and quite distinct from 

 the middle one. Dorsal (IX) X, 33-36. Anal 32-35. 



Body with dark cross-bars. 



Patagonia ; Magellan Straits. 



Here described from five specimens, 200 to 300 mm. in total length, including the 

 type of the species. 



(2) Champsocephalus gunna^'i. (PL X. fig. 2.) 

 Lonnberg, Swedish South Polar Exped., Fish., p. 37 (1905). 

 Depth of body 6| in the length, length of head 3 J. Snout as long as postorbital 

 part of head. Diameter of eye 5 in the length of head, interorbital width 3|. 

 Supraorbital edges not raised. Maxillary extending to below anterior ^ of eye. 

 Uppermost and middle opercular spines only free distally, appearing as a single bifid 

 spine. Dorsal IX (X), 37-40. Anal 36-38. Plumbeous, with some broad darker 

 cross-bars. 



South Georgia. 



Here described from a specimen of 420 ram, 



TRANS. ROY. SOC. EDIN., VOL. XLIX. PART II. (NO. 2). 37 



