NOTOTHENIIDAE 



83 



those of the outer row a little enlarged anteriorly ; occiput, interorbital region, cheeks 

 and opercles with smooth scales, those between the eyes as large or nearly as large as 

 those on sides of body and on operculum ; scales not embedded, extending forward on 

 upper surface of head to opposite middle or anterior parts of eyes; 13 to 16 gill-rakers 

 on lower part of anterior arch. Scales on body ctenoid ; 46 to 50 in a lateral longitudinal 

 series; 37 to 40 tubular scales in upper lateral line, which ends below or a little in 

 advance of last ray of dorsal, 7 to 1 1 in lower lateral line. Dorsal VI-VII (VIII in one 

 example) 27-30; longest spine about $ length of head. Anal 29-31. Pectoral f to f 

 length of head, a little longer than pelvics, which extend to the origin of anal or beyond. 

 Caudal rounded; caudal peduncle f to fas long as deep, its least depth f to § length of 

 head. Brownish; uniform or with indistinct darker cross-bars on upper parts of body; 

 often some round pale spots on back and sides ; spinous dorsal more or less dusky, plain 



Fig. 39. Notothenia squamiceps. 



x 1*. 



or with a round dark spot posteriorly ; sometimes the greater part of the fin is dark, 

 with a clear area posteriorly ; soft dorsal uniform or with broad dark areas separated 

 by narrower clear interspaces ; caudal sometimes with dark cross-bars ; anal uniform or 

 coloured like the soft dorsal; pectoral yellowish; pelvics partly blackish. 



Hab. Patagonia and the Straits of Magellan; Falkland Islands. 



In addition to the above, the British Museum has received a small specimen, 45 mm. 

 in total length, from Port Churruca, Magellan, as an exchange from the United States 

 National Museum (U.S.N.M. No. 76883). There seems to be little doubt that Thompson 

 was correct in separating this species from the closely related N. sima, and I feel fairly 

 certain that his specimens, as well as those collected by the 'Discovery' Expedition, 

 are referable to Peters' species, which was not previously represented in the British 

 Museum collection. N. squamiceps differs from N. sima chiefly in having a deeper body, 

 wider interorbital region with larger scales between the eyes, more numerous gill-rakers, 

 and a different coloration. 



