6 "TERRA NOVA' EXPEDITION. 



Compared with examples of T. 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 ana] fin, whereas 

 it is much nearer the snout in T. lepidorhinus. The much shorter lower lateral line 

 ami the more numerous dorsal rays are further important differences. 



I ■_'. Pleuragramma antarcticum, Bouleng. 



Ross Sea. L 58 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 qo1 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 ....... Dolloidraco, Roule. 



['.. 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 ......... Hisliodraco, gen. nov. 



Head as long as broad, much broader than deep; interorbital region 



wide .......... Pogonophryne, Regan. 



IT. No barbel : operculum and suboperculum each forming a, prominent spine . TTarpagifer, Richards. 



. [rtedidraco, Lonnberg. 

 Artedidraco, Lonnberg, 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 .''.', in the length, length of head 2 ( ; to .">. I >. m n, '-'■">. A. 17-18. Anterior 



rays of soft dorsal longest ......... orianae. 



Depth of body I in the length, length of head 2J. D. m, 23-24. A. 17. .Middle rays of soft dorsal 



longest ............ mitus. 



