CHAENICHTHYIDAE 



79 



of head. Rostral spine erect or retrorse. Jaws equal anteriorly or lower jaw projecting ; 

 maxillary extending to below anterior part or nniddle of eye. Dorsal V-VII, 38-45 (51) ; 

 third or fourth spines generally longest ; spinous dorsal separated from soft dorsal by 

 an interspace which varies from less than | to about | of the length of the base of the 

 former. Anal (33) 34-38. Pectoral with 22 to 24 rays, | to nearly f length of head, 

 extending to above vent or anterior rays of anal; pelvics I 5, | to | length of head, 

 reaching vent, origin of, or anterior rays of anal in young, not reaching vent in adult. 

 Caudal subtruncate or rounded. Pale brownish or greyish ; head and body with dark 

 spots and bars ; spinous dorsal blackish ; other fins pale or more or less dusky. 



Fig. 50. Chionodraco kathleenae. x J. 



Hub. Mac-Robertson Land; Queen Mary Land; South Victoria Land. 



The types of the species, 250 to 500 mm. in total length, are from the Ross Sea 

 (74° 25' S, 179° 3' E), 296 metres, and McMurdo Sound, 187 to 375 metres. The 

 B.A.N.Z. Antarctic Research Expedition obtained 16 examples, 275 to 470 mm. in 

 total length, from off Mac-Robertson Land at a depth of 219 metres: these specimens 

 have been included in the description of the species. Two young specimens (70 and 

 71 mm.) were collected by the same expedition with mid-water nets hauled obliquely 

 from 169 metres to the surface. The eye is proportionately smaller in these young 

 specimens, the diameter being nearly 6 in the length of the head, the pelvic fin-rays 

 are simple, and the pelvic fins themselves are blackish in their distal parts. 



Chionodraco hamatus (Lonnberg). 



Chaenichthys rhinoceratus subsp. hamatus, Lonnberg, 1905, Wiss. Ergebn. Schwed. Siidpol.- 



Exped., V (6), p. 47. 

 Chionodraco hamatus, Lonnberg, 1906, K. Svensk. Vet.-Akad. Handl., XL (5), p. 99; Regan, 

 1913, Trans. R. Soc. Edinburgh, xlix, p. 288; Norman, 1937, t.c, p. 77, figs. 7 A, 8. 



Closely related to C. kathleenae, but with a somewhat larger eye, diameter of which 

 is 4§ in length of head; interorbital region broader, width 3f in length of head. Dorsal 

 VII, 37. Anal 33. Pelvics shorter, \ length of head. 



Hab. Graham Land; South Shetlands. 



The type of the species, 330 mm. in total length, was from south of Snow Hill, 

 Graham Land, at a depth of 125 metres. Through the kindness of Professor Dr H. 



