1880.] 



NATURAL SCIENCES OF PHILADELPHIA. 



IT 



30.1 23^ 



16 

 25 



5.1 

 81 

 12 



101 

 24§ 



7-1 



'3 



321 29^ 



1.25 16 



14| 



The two specimens on which the above description is principally 

 founded were procured in the market of San Francisco, and were 

 l)rought from the vicinity of Monterej- Bay. One is an adult, the 

 other an immature individual, and the two present considerable 

 variation in external form, and in the proportions of some of the 

 parts, as will be evident by the dimensions and further description 

 of each specimen here appended. 



Dimensions of the Two Specimens. No. 1. No. 2. 



INCHES. INCHES. 



Total length, including caudal, . . 17.75 10.05 



Length without caudal, . . . 14.65 8.30 



Greatest depth of body, . . . 4.50 1.96 



Greatest thickness of body, . . . 2.38 .92 



Length of head, 3.74 2.08 



Circumference behind base of pectorals, 10.88 



Longitudinal diameter of eye, . . .80 .52 



Length of snout, 1.25 .63 



Interorbital width, round curve of forehead, 1.75 .76 

 From tip of snout to dorsal, along dorsal 



outline, 4.75 2.46 



Length of base of dorsal fin, . . . 8.96 4.95 



" " " spinous dorsal, . . 2.40 

 From tip of lower jaw to anal, along ab- 

 domen, 8.<^0 4.39 



Length of base of anal, . . . . 5.02 3.32 



Length of pectoral base, ... .87 .45 



Lengtbof pectoral to tip of longest (7'-') ray, 3.36 1.82 



From tip of snout to insertion of ventrals, 4.46 2.42 



Length of ventrals, . . . 2.30 1.20 



Height of first dorsal spine, . . . .25 .25 



" " second " " . . . .56 ,40 



" " third " " . . . .82 .55 



" " fourth " " . . . .93 .68 



" " fifth " " . . , 1.03 .70 



" " sixth " " . . . 1.05 .73 



" " seventh" "... 1.09 .75 



" " eighth " " . . . 1.13 .77 



" " ninth " " . . . 1.10 .70 



Distance from 1st dorsal to lateral line, . 1 .50 .65 



Height of soft dorsal, in front, . . 1.30 .90 



Depth of anal, 1.30 .90 



Width of caudal peduncle, . . . 1,12 .65 



Length of lower jaw, . , , , 1,62 .82 



" " maxillary, along its cui-ve, . 1.50 ,75 



Rays of dorsal, ix-26 ix-25 



"anal, ii-25 ii-25 



541 511 



40 40 



23 22 . 



301 29 



151 14 



If 3 



4 5 



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61 



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 9 



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 10^ 



71 



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 9 

 9 



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 10 



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