ZOOLOGY. 
23 
38. HOMALOPOMUS TROWBRIDGII, Grd. 
Plate XLa, figs. 1-4.—• General Report upon Fishes. 
Snout pointed ; mouth deeply cleft; posterior extremity of maxillary extending to a verti¬ 
cal line drawn through the posterior rim of the pupil. Eye large. Second and third dorsals 
continuous ; anal fins continuous also. Extremity of pectorals reaching the anterior margin of 
the anal fin. Color, greyish-brown hove ; silvery-grey beneath. 
“ California whiting.” 
Fist of specimens. 
Catalogue 
number. 
No. of 
specimens. 
Sex and 
age. 
Locality. 
When 
collected. 
Collected by— 
Original 
number. 
Nature of 
specimens. 
285 
i 
Adult. 
Astoria, 0. T._ 
1856 
Lieut. Trowbridge... 
Alcoholic. 
XIV. FAMILY PLEURONECTIDtE. 
*> 
39. PLATICHTHYS RUGOSUS, Grd. 
General Report upon Fishes. 
Eyes moderate, situated on the left side ; interocular space moderate. Peduncle of tail long; 
Origin of dorsal fin corresponding to a vertical line intersecting the middle of the pupil. Scales 
very rugose and plate like ; lateral line slightly arched above the pectoral fins. Left side dark 
reddish brown ; fins olivaceous, dorsal and anal, with alternate vertical bands of black ; caudal 
with longitudinal bands of the same hue ; ventrals and pectorals unicolor ; right side dull 
yellow. 
This and the following four species belong to the “ Flounder” tribe. 
List of specimens. 
Catalogue 
number. 
No. of 
specimens. 
Sex and 
age. 
Locality. 
When 
collected. 
Collected by— 
Original 
number. 
Nature of spe¬ 
cimens. 
606 
5 
Adult. 
Presidio, Cal. .. 
1853 
Lieut. Trowbridge ... 
Alcoholic. 
40. PLATICHTHYS UMBROSUS, Grd. 
General Report upon Fishes. 
Eyes rather large, and situated upon the right side ; interocular space narrow. Peduncle of 
tail short. Origin of dorsal fin corresponding to a line intersecting the anterior rim of the pupil. 
Scales normal, though some of them are quite rugose ; lateral line conspicuously arched above 
the pectoral fins. Right side uniform blackish brown ; left side light brown ; dorsal, anal and 
caudal fin obsoletely maculated. 
