ANTARCTIC FISHES OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 281 



Total length 100 mm. 



Patao-onia ; Magellan Straits ; Graham Land ; Falkland Islands ; South Georgia ; 

 South Orkneys ; Marion Islands ; Kerguelen. 



The Scotia examples are from Station 118, Port Stanley, Falkland Islands, and 

 Station 325, Scotia Bay, South Orkneys. 



Family 3. Bathydraconid^. 



The depressed head, produced snout, n on -protractile mouth, and absence of the 

 spinous dorsal fin distinguish this family externally from the Nototheniidse ; the genera 

 with spatulate snout may be distinguished from the Chsenichthyids without a spinous 

 dorsal fin by their scaly body. 



The skeleton of Gymnodraco differs from that of Notoihenia in the more depressed 

 skull and more produced rostrum, the elongation of the palatine, which loses its lateral 

 ethmoid attachment, and the separation of the mesopterygoid and the metapterygoid, 

 so that the upper margin of the quadrate is free. The pectoral arch is as in Notothenia. 

 There are 49 vertebrae (20 + 29), the prsecaudals with parapophyses behind which 

 the long slender epipleurals are inserted, and the feeble ribs attached to the epipleurals 

 at some distance from the centra. 



I have ascertained that Bathydraco agrees with Gymnodraco in the structure of 

 the palatine and of the pectoral arch, and in the presence of ribs. 



Synopsis of the Genera. 



I. Body scaly ; snout spatulate ; teeth villiform or cardiform, in bands, without 

 canines. 



A single lateral line running to or towards middle of base of caudal fin ; body 

 completely scaled . . . . . . . 1. Bathydraco. 



Lateral line running near base of dorsal fin ; body completely scaled. 



2. Gerlachea. 

 Lateral line running near base of dorsal fin ; scales in scattered groups. 



3. Racovitzaia. 



[I. Body naked; snout pointed; teeth curved, compressed, close-set in a single 



series, with strong anterior canines . . . . .4. Gymnodraco. 



1, Bathydraco, Giinth., 1878. 

 Anji. Mag. Nat. Hist. (5), ii. p. 18. 

 Body scaly ; a single lateral line, running to or towards middle of base of caudal. 

 Snout spatulate ; jaws with small villiform teeth in bands. 

 Antarctic, in deep water. 



GiJNTHER has stated 10 branchiostegals for B. antarcticus, but I find only 7. 

 DoLLO gives 6 for B. scotiae, but I count 7 in that species also. 



