FISHES FROM NORTHEASTERN PACIFIC— CHAPMAN 525 



Description.— (The measurements and counts of the holotype are 

 given followed by the range and average of the paratypes in paren- 

 theses.) Dorsal rays 13 (11 to 13; 11.7); anal rays 25 (22 to 25; 23 5)- 

 pectoral rays 16 (15 to 16; 15.1); pelvic rays 8 (8); scales in 'lateral 

 Ime 38 (35 to 39; 36.9); number of AO 17 (15 to 18; 16.0). Proportions 

 of the length without caudal: Length of head 2.9 (2.6 to 3.1; 2.90); 

 snout to dorsal 2.1 (1.7 to 2.1; 1.93); snout to adipose 1.3 (1.2'to 1.4^ 

 1.29); snout to pelvics 2.4 (2.0 to 2.4; 2.25); snout to anal 1.7 (1.6 

 to 1.9; 1.75); greatest depth 3.5 (3.0 to 3.9; 3.38). Proportions of the 

 length of head: Diameter of eye 2.5 (2.0 to 2.8; 2.35); length of upper 

 jaw 1.5 (1.2 to 1.6; 1.40); length of caudal peduncle 2.5 (1.8 to 3.4; 



Figure 65.—Myctophum oculeum, new species: Holotype (U.S.N.M. no. 108146), 42 mm long, from station 



533D.T. 



2.49); depths of caudal peduncle 3.8 (2.7 to 4.0; 3.45); length of 

 pectoral fins 1.9 (1.4 to 2.0; 1.69); length of pelvic fins 2.1 (1.5 to 2.1; 

 1.96). 



The body is compressed, short, and deep. The scales are cycloid 

 and caducous. Those of the lateral line are greatly broadened. The 

 eyes are large but normal; the lenses are only slightly elliptical and 

 are not noticeably turned upward. The anterior profile is more 

 rounded than common in the genus. The premaxillaries have each 

 a band of small villiform teeth along the entire edge, even on the 

 lateral portion of the bone. The dentaries are toothed in a similar 

 fashion. The vomer has a small round patch of teeth at each of 

 the two anterolateral corners of the head of the bone, but none be- 

 tween or on the shank. The palatine has a small patch of teeth lying 

 closely behind the patches on the head of the vomer, a short bare 

 space, and then a small band of teeth extending ventroposteriorly to 

 the end of the bone. The maxillary is expanded posteriorly, forming 

 a broad triangle; the square-cut posterior edge reaches beyond a 

 perpendicular from the posterior margin of the eye. The gill rakers 

 are long and slender and bear a row of toothlike processes on the 

 inner edge of each. 



