i^32 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



braue .sometimes black. Two black spots on the spinous dorsal, oue 

 in front, (lie otlier at the tips of the posterior rays. Other hns 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 ]\luseum are 

 numbered 23503 on the register. 



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

 and are of very u early 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. 



Total ]eu<> til, to tip of caudal 



Total length, without caudal 



Length of head, to tip of operculum 



Greatest depth of body at origin of 1st dorsal 



Greatest width at preopercles 



Depth of caudal peduncle 



Tip of snout to insertion of ventrals 



Tip of snout to origin of 1st dorsal 



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



Tip of snout to origin of 2nd dorsal 



Tip of snout to origin of anal 



Height of longest ray of 1st dorsal 



Height of longest ray of 2nd dorsal .4;') 



Length of base of 1st dorsal .50 .58 



Length of base of 2nd dorsal .85 .85 



Length of base of anal .OS .08 



Width of pectoral base 28 .30 



Length of ]iectoral, from center of base .80 .80 



Length of ventrals .31 .31 



Longitudinal diameter of orbit .20 .26 



Length of snout .24 .26 



Interocular width 065 .08 



Tip of snout to end of maxillary .31 .32 



Length of i)reopercular process .21 .22 



San Francisco, December^ 1879. 



