6 “TERRA NOVA” EXPEDITION. 
Compared with examples of 7. lepidorhinus of nearly the same size this species 
has a shorter snout, more oblique mouth and broader interorbital region. . The tail is 
shorter, as the vent is nearly equidistant from tip of snout and end of anal fin, whereas 
it is much nearer the snout in 7. lepidorhinus. The much shorter lower lateral line 
and the more numerous dorsal rays are further important differences. 
12. Pleuragramma antarcticum, Bouleng. 
Ross Sea, 158 fathoms. Cape Evans, frozen on an iceberg. 
Harpagiferinae. 
The subfamily Harpagiferinae includes Nototheniids with the body naked, the 
gill-membranes broadly united to the isthmus and not forming a fold across it, the 
operculum hooked so that its upper edge is deeply concave, and the upper lateral line 
with tubules, the lower reduced to a series of pores. 
The genera with a mental barbel were previously represented in the British 
Museum only by an example of Dolloidraco longipinnis recently received from Professor 
Roule, but the ‘Terra Nova” collection includes a large series of fishes of this group, 
representing six species. 
Synopsis of the Genera of Harpagiferinae. 
I. A mental barbel ; opercles not spinate. 
A. Post-temporal not prominent; head not or scarcely broader than deep ; interorbital region 
narrow. 
Spinous dorsal fin above base of pectoral. : : : ‘ Artedidraco, Loennb. 
Spinous dorsal fin above operculum . : 5 ; b : . Dolloidraco, Roule. 
B. Upper limb of post-temporal projecting as a prominent curved ridge; spinous dorsal above 
operculum. 
Head longer than broad, scarcely broader than deep; _ interorbital region 
narrow ; : z : : : : 5 : Histiodraco, gen. noy. 
Head as long as broad, much broader than deep; interorbital region 
wide . é 5 : : : ; : : ‘ Pogonophryne, Regan. 
II. No barbel ; operculum and suboperculum each forming a prominent spine . Harpagifer, Richards. 
Artedidraco, Linnberg. 
Artedidraco, Linnberg, Swedish South Polar Exped. Fish. p. 39 (1905). 
Head without ridges or tubercles, covered with loose, smooth skin, longer than 
broad, not or scarcely broader than deep; interorbital region narrow. Post-temporal 
not prominent. Opercles not spinate. A mental barbel. Body compressed. Spinous 
dorsal fin above base of pectoral. 
Synopsis of the Species. 
I. Barbel club-shaped, with papillose terminal knob. 
Depth of body 5 to 54 in the length, length of head 25 to 3. D. mi-tv, 25. A. 17-18. Anterior 
rays of soft dorsal longest —. ¢ : 2 3 ; : : : orianae. 
Depth of body 4 in the length, length of head 22. D. 1m, 23-24. A. 17. Middle rays of soft dorsal 
longest 5 ; ; : c . : ; : 0 F : mirus. 
