434 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 50. 



3. NOTOTHENIA LATIFRONS, new species. 



Plate 3, fig. 1. 



Type and two paratypes from Sandy Point and Laredo Bay, 

 Straits of Magellan. Type 63 mm. in total length, Cat. No. 76854, 

 U.S.N.M. 



Head 3 J in body to end of muscular part of tail (0.30); depth 4§ 

 (0.22); eye, 4 J in head (0.07 to 0.075); snout, 3f (0.08); maxillary 2i 

 (0.11); mandible 2f (0.125 to 0. 13); width of interorbital space 3 J 

 (0.09); length of pectoral IJ (0.22) to 0.23); of ventral IJ (0.19.to 

 0.20); least depth of caudal peduncle 3 (0.09 to 0.10); length of com- 

 bined dorsal bases 1§ in body without caudal (0.60); of anal base 2f 

 (0.42 to 0.44); D.V, 30; A. 25 (24); scales with pores in upper lateral 

 line 56 (51 to 56); in lower lateral Hne 10 (or 9); in lateral series 73 

 (67 to 73); in transverse series obliquely forward and upward from 

 anal insertion 8 + 20; gill rakers 7+15 (18 to 22). 



Head broad above but deeper than wide at preopercle; snout 

 rounded, not pointed; profile arched strongly before eyes, nearly 

 level behind; maxillary ending under anterior border of eyes; jaws 

 nearly equal; interopercle nearly overlapped at angle of opercle; 

 teeth in two or three rows anteriorly in both jaws, in a single row 

 laterally; upper margin of eye covered by interorbital; eye looking 

 laterally; gill rakers very short. 



Dorsel inserted above pectoral base; interdorsal space equal to at 

 least tliree interspinous spaces; distance last dorsal ray to end of 

 muscular part of tail equal to least depth of caudal peduncle; last 

 dorsal ray over last of anal; pectoral edge rounded; ventral not ex- 

 tending to anus; caudals broken in all specimens. 



Upper lateral line ending under thhd from last dorsal ray and dis. 

 tant four scales from beginning of lower. 



Scales ctenoid, absent on head save on upper edge of opercle and 

 cheek; present on suprascapular area; scales also absent before ven- 

 trals between their bases and gill opening, those between ventrals 

 forming a broad band covering half of distance between them; scales 

 between occiput and dorsal small. 



Color uniform; silvery below and darker above; second dorsal 

 dusky distally; narrowly margined with white; first dorsal somewhat 

 darker; anal similar to second dorsal; other fins colorless or slightly 

 dusky, but pattern, if any, completely faded. 



This species differs from Notothenia macrocephala in the larger num- 

 ber of scales in the upper lateral line, the larger number in longitudi- 

 nal series; longer maxillary and mandible in specimens of a size; the 

 roughness of the scales to the touch, which are strongly ctenoid and 

 without the dermal flap which characterizes N. macrocephala; and in 

 the presence of a bare space before the ventrals. 



