470 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



rays. Anal ijapilla oiie-lialf as long as eye and equal to interorbital 

 distance. The anal is similar to the soft dorsal in form and is appar- 

 ently made up of rays only, the first of which is one-third as long as the 

 last and the last but one. The last anal ray is five-sixths as long as 

 head ; it extends backward to a vertical through origin of middle caudal 

 rays, while the last dorsal ray extends beyond this line. The anal ends 

 slightly in advance of the end of soft dorsal. 



Caudal convex behind (imperfect in the typical example), nearly as 

 long as the head. 



The middle pectoral rays are longest, about equal to length of head. 

 None of the pectoral rays are free and silk-like. 



The ventral originates immediately beneath the pectoral origin and 

 does not reach to vent ; its length equals greatest height of body (three- 

 fourths length of head). 



Br. v; D. VI, 13i; A. Ill; C. 13 (developed) ; P. 20; v. i, 5; L. lat. 

 26 ; L. trans. 10. 



Colors. — Top of spinous dorsal black. Second dorsal and caudal 

 spotted with dark color. Anal with some traces of dark color on its 

 first half. Yentrals black. Body and tail olivaceous, a broad dusky 

 margin on all the scales. Head colored like body but cheeks dusky and 

 traces of purplish on side of snout. 



Dedicated to Gapt. Henry E. Mchols, U. S. 1^. 



MEASUREMENTS. 

 Species: Oohius Nieholsii. 



Current number of specimen. 

 Locality 



29803. 



Departure 



Bay, British 



Columbia. 



Millimeters. 



Extreme length - 



Length to origin of middle caudal raya 



Body: 



Greatest height 



Greatest width 



Height at veutrals 



Least height of tail 



Length of caudal peduncle 



Head : 



Greatest length 



Greatest width 



Width of interorbital area 



Length of snout 



Length of operculum 



Length of maxillary 



Length of intermaxillary 



Length of mandible 



Long diameter of eye 



Short diameter of eye. -• 



Dorsal (spinous) : 



Distance from snout 



Length of base 



Length of first spine 



Length of second spine 



Length of last spine (6th) 



{soft) : 



Length of base 



Length of first ray 



Length of longest rays (13th and 14th). 



Length of last ray 



About 112 

 90 



19 

 12 

 15 

 11 

 15 



24 



16 



3 



5 



7 



10 

 6 

 5 



29 

 14 

 12 

 13 

 10 



26 

 10 

 23 

 23 



