412 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Gill-rakers similar on all tbe arches, short, immovable, much broader 

 than long, each jirovided with 4 or 5 short needle-like spines. A slit 

 behind fourth gill. Pseudobranchiae developed, partly hidden by a fold 

 of the membraue. Branchiostegals 7, the membranes overlapping ante- 

 riorly, as in the Salmonidcc. 



Scales small, deciduous; those of the lateral line large, non-imbricate, 

 plate-like, becoming smaller i^osteriorly, the series terminatiug abrubtly 

 opposite middle of the base of the anal. 



Fins all very small. Pectorals placed low, their length two-fifths that 

 of the snout. Ventrals far back, entirely behind the dorsal, their dis- 

 tance from base of caudal half that from front of orbit. Distance from 

 middle of dorsal basis to base of caudal half its distance from the tip 

 of the snout. 



Anal elongate, high anteriorly, its base terminating at a point distant 

 one-half diameter of orbit from base of caudal. Adipose dorsal high and 

 narrow, directly over the end of the anal. 



Caudal small, widely forked, the middle rays two-fifths the length 

 of longest. End of caudal peduncle emarginate, the caudal rays radi- 

 ating from the upper and lower angles. (In the type specimen the two 

 lobes of caudal are entirely separate, without trace of connecting mem- 

 brane.) Eudimentary rays long, extending along upper and lower sides 

 of caudal peduncle for a distance greater than diameter of orbit. Tips 

 of adipose dorsal and posterior anal rays reach rudimentary caudal rays. 



Dorsal rays 8; anal rays 31; pectoral rays 11; ventral rays 9; lateral 

 plates GO. Vent slightly behind base of ventral fins. 



Color, in spirits, light olive-brown, becoming darker on the back, belly, 

 and towards the tail. Above with a few small, distinct, black dots. 

 Sides with some light brownish-yellow shading, a very narrow, length- 

 wise, silvery streak along the middle of the abdomen. Base of pectoral 

 silvery, with a dark spot above. Bases of other fins jet-black, the color 

 usually extending on the bases of the rays. 



Sides of head silvery; opercles, top of head, and tip of snout dark; 

 mandibular rami bright silvery, and provided each with a double series of 

 minute "phosphorescent" spots. 



This si)ecies is known to us from a single specimen obtained in the 

 harbor of Port Townsend, Wash., by Mr. Brown, assistant in the custom- 

 office at Port Townsend, and by him presented to the United States 

 National IMuseum. The type is 9^ inches in length, and is in good con- 

 dition. 



