28 



PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



The pectorals reach to the origin of the anal ; ventrals do not reach 

 to the vent. 

 Vomerine and palatine teeth present. Siiin smooth. 

 Radial formula: B. VI; D. VlIE, IG; A. 12; V. I, 3; P. 15; C. 15. 

 Color: Uniform dark brown above, lighter on the throat and belly. 



Myctophum crenulare, J. & G. 



The museum has an additional specimen of this species, which was 

 washed aboard a United States Coast Survey vessel commanded by 

 Mr. William H. Dall, in N. lat. 49°, W. long. 151°. It was collected by 

 Mr. W. G. Hall. The specimen is numbered 23945 in the National 

 Museum Fish Catalogue. 



Description.— D. I, 11; A. I, 16; P. 13; V. 7; scales 2^-45-6|. 



The basis of coinjjarison for the measurements of difiereut parts of the 

 body is the total length without caudal. The greatest height of the 

 body is contained 4 times in this length, the length of the head 3§ times ; 

 the least depth of the tail equals ^ of the height of the body at the ven- 

 trals, height of the head nearly equal to its length without snout. Eye 

 large, its diameter being more than the interorbital distance, and con- 

 tained 3 times in the length of the head. Posterior margin of the pre- 

 operculum oblique. Snout very short and obtuse, about ^ as long as 

 the eye. The maxillary is f as long as the head, scarcely dilated pos- 

 teriorly; it reaches almost to the posterior margin of the preoperculum. 

 The origin of the dorsal fin is equally distant from the tip of the snout 

 and the root of the caudal, and is about over the tips of the extended 

 ventrals ; it is about in the vertical through the sixteenth scale of the 

 lateral line ; its last ray is over the twenty- fifth scale of the lateral line 

 and the eighth anal ray. The i)ectorals are imperfect, but they appar- 

 ently do not extend much beyond the origin of the ventrals. Scales 

 coarsely denticulated, some of them showing about 6 teeth on their free 

 margin ; those on the lateral line are conspicuously the largest. Lower 

 parts with a double series of pearl-colored spots, besides a few isolated 

 ones. 



Measurements. 



Current number of specimen. 

 Locality 



5 (716) 



I ;;3945. 



Lat. 49° N., 

 Long. 151 W., 

 Sept. 15, 1871. 



