104 



U. 8. P. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



and dichotomised rays, and a rudimentary, undivided one upon tlieir external edge. The pec- 

 torals are well developed, posteriorly falciform, and terminating into a point. 



Br. VI : VI ; D VII, 13 ; A I, 27 ; C 5, 1, 8, 7, 1, 7 ; V I, 5 ; P 15. 



The scales are large, constituting but thirteen longitudinal series upon the line of greatest 

 depth of the body. Longer than deep on the dorsal region, and deeper than long on the 

 abdominal region, tliey are rounded off upon their posterior margin, and truncated upon their 

 anterior margin. Radiating grooves may be seen upon the posterior section of the scale only. 



The cheeks, opeiculatnr apparatus, and the upper surface of the head, are covered witli large 

 and imbricated scales, similar to the scales of the body, except that their outline is subjected to 

 infinite variations. 



The dorsal region above the silver band is greyish brown, as also the upper surface of the 

 head ; the silver band is margined with bluish black. The flanks, sides o head, and belly are 

 light brown in the young and silvery in the adult. The fins are olivaceous and unicolor. 



lieferences to the figures. — Plate XXII c, fig. 1, represents, size of life, AlJierinopiis califor- 

 niensis, from San Fiancisco. Fig. 2, an outline of the fish seen from above. Fig. 3, an outline 

 of the head from beneath. Fig. 4, a section of the body taken across its middle. Fig. 5 is a 

 scale from the dorsal region. Fig. 6, a scale from the abdominal region. 



List of specimens. 



CO 



Adult.. 

 ...do.. 

 Young . 



Adult 



Locality. 



San Fiancisco, California . 

 do 



do 



Presidio, California .. 

 San Diego, California. 

 do 



.do. 



UVmalts bay, California 

 do 



1653 

 1853 

 1853 

 1853 

 1854 

 1853 

 1853 

 1856 

 185C 



Wlience obtained. 



Lieut. R. S. Williamson . 



Lieut. A. VV. Whipple 



Lieut. W. P. Trowbridge. 



Major W. Emory 



Lieu". W. P. Trowbridge. 

 do 



E. Samuels . 

 ..do.. 



Alcoholic. 

 ....do 



-do. 

 .do. 

 .do. 



.do... 

 .do... 



.do. 

 .do. 



Collected by- 



Dr. Heerraann .. 



Dr. Newberry 



Dr. Kennerly 



Lieut. Trowbridge 



A. Schott 



A. Cassidy 



do 



E. Samuels . 

 do.... 



