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. 



&quot; California whiting.&quot; 



List of specimens. 



XIV. FAMILY PLEURONECTIDJE. 



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 &quot; Flounder&quot; tribe. 



List of specimens. 



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. 



