506 PROCEEDINGS OF THE NATIO^TAL MUSEUM vol.86 



The paratypes in the United States National Museum bear the 

 numbers 108151-108156. 



Description. — (The proportions and comits of the holotype are 

 given, followed by the ranges and averages of the paratypes in 

 parentheses.) Dorsal rays 8 (7 to 9; 7.7); anal rays 24 (23 to 27; 

 24.3); caudal rays 51 (46 to 56; 50.8); pectoral rays 14 (13 to 14; 13.9); 

 scales in lateral series 25 (23 to 27; 24.6). Proportions of the length 

 without caudal: Length of head 3.4 (3.2 to 4.0; 3.59); snout to dorsal 

 1.8 (1.8 to 2.3; 2.01); snout to adipose 1.2 (1.1 to 1.3; 1.20); snout to 

 pelvics2.0 (1.9 to 2.4; 2.0); snout to anal 1.4 (1.3 to 1.6; 1.55); greatest 

 depth 4.4 (4.2 to 6.2; 5.46); origin of dorsal to base of caudal 2.0 

 (1.6 to 2.1; 1.90); origin of anal to base of caudal 3.1 (2.5 to 3.1; 2.82); 

 dorsal to adipose 2.9 (2.5 to 3.1; 2.82). Proportions of the length of 

 head: Diameter of eye 2.6 (2.2 to 2.8; 2.59); length of upper jaw 6.2 



FiorKE 58.—Ba1hytagui ala»canut, new species: Holotype (U.S.N.M. no. 108148), 83 mm long, from 



station 444C. 



(3.2 to 6.7; 4.43); depth of caudal peduncle 4.4 (3.2 to 5.0; 4.16); 

 interorbital space 3.7 (3.1 to 6.5; 4.34). Some of the proportions 

 shown above vary considerably. Part of tliis variation is due to the 

 changmg of the bod}- proportions during growth. The small number 

 of specimens does not permit a statement of the degree of this change. 

 Some part of this variation is due also to difficulties in measuring the 

 soft small specimens accurately. 



The body is completely clothed with large caducous scales. The 

 eyes are large and circular, projecting slightly into the dorsal outline. 

 The interorbital space is decided^ concave. The snout is short. 

 The mouth is small. The maxillary reaches nearly to a vertical from 

 the anterior edge of the lens of the eye. The teeth on the dentaries 

 are small and sharp, in a smgle closely packed row. There are four 

 moderately large teeth on the head of the vomer, and none on the 

 shank or on the palatines, premaxillaries, maxillaries, or tongue. 

 The lower jaw projects slightly. The origin of the dorsal fin is, in most 

 specimens, a little ahead of the middle of the body. The adipose 

 originates over the sixteenth or seventeenth ray of the anal, with the 

 distal portion extending over the second or third caudal ray. The 



