332 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



braiie sometimes black. Two black spots ou the spinous dorsal, one 

 in front, the other at the tips of the posterior rays. Other fins oliva- 

 ceous. 



Pectorals and caudal barred ; ventrals and anal sometimes black, 

 sometimes colorless. Under surface creamy-white. 



Several specimens obtained in San Francisco market among heaps of 

 Pandalus Dance. Two of these now in the United States Museum are 

 numbered 23503 ou the register. 



As the sjiecimens obtained vary less than is the case with many species, 

 and are of very nearly the same dimensions, I subjoin measurements of 

 two only. 



The principal variations are in the height of the dorsals and in the 

 color of the paired fins and of the anal, which are much darker in some 

 than in others. The dimensions are all axial, unless otherwise stated. 



Inches. Inches. 



Total lengtli, to tip of caudal 3. 38 



Total length, without caudal 2. 80 



Length of head, to tip of operculum .95 



Greatest depth of body at origin of 1st dorsal .47 



Greatest width at prcopercles .49 



Depth of caudal peduncle .14 



Tip of snout to insertion of ventrals .75 



Tip of snout to origin of 1st dorsal .80 



Tip of snout to origin of 1st dorsal along dorsal outline .90 



Tip of snout to origin of 2nd dorsal 1.44 



Tip of snout to origin of anal 1. 46 



Height of longest ray of 1st dorsal .46 



Height of longest ray of 2ud dorsal .45 



Length of hase of 1st dorsal .56 



Length of base of 2ud dorsal .85 



Length of base of anal .68 



Width of pectoral base .28 



Length of pectoral, from center of base .80 



Length of ventrals .31 



Longitudiual diameter of orbit .26 



Length of snout .24 



Interocular width . 065 



Tip of snout to end of maxillary .31 



Length of preopercular process .21 



San Francisco, December, 1879. 



5.50 

 }.90 

 .99 

 .55 

 .55 

 .16 

 .82 

 .83 

 .95 

 L.54 

 1.56 

 .41 



.58 

 .85 

 .68 

 .30 

 .80 

 .31 

 .26 

 .26 

 .08 

 .32 

 .22 



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