No. 4. 
REPORT ON PISHES COLLECTED ON THE SURVEY. 
BY CHARLES GIRARD, M. D. 
1. POMOXIS NITIDUS, Grd. 
Gen. Rep. 6. Plate II, Figs. 5—8. 
Spec. Char. —Posterior extremity of maxillary corresponding to a line intersecting the pupil. Insertion of ventrals situated 
opposite the inferior edge of the base of the pectorals. Anterior spiny ray of anal fin under the fourth dorsal one. Posterior 
margin of caudal fin sub-concave. Upper regions reddish, spotted and fasciated with brown; inferior regions silver and golden. 
161. Houston river, Kentucky. E. L. Bertliaud. 
2. AMBLOPLITES INTERRUPTUS, Grd.—The Perch of San Francisco. 
Gen. Rep. 10. Plate II, Figs. 1—4. 
Spec. Char. —-Posterior extremity of maxillary reaching a vertical line drawn back of the pupil. Posterior margin of caudal 
fin sub-emarginated. Origin of anal fin opposite the eleventh ray of the dorsal. Interrupted dark bands on the sides. Two 
screaks diverging from the eye—one running towards the opercular spot, the other obliquely downwards. 
218. San Joaquin river, California. Dr. A. L. Heermann. 
3. PARALABRAX NEBULIFER, Grd. 
Gen. Rep. 33. Plate XII, Figs. 1—4. 
Spec. Char. —Snout sub-conical; extremity of maxillary reaching the anterior edge of the pupil. Eyes moderate. Baso 
of pectorals a little in advance of that of the ventrals. Irregular dark blotches distributed over the dorsal region. 
282. Monterey, California. Lieutenant W. P. Trowbridge. 
4. PARALABRAX CLATHRATUS, Grd. 
Gen. Rep. 34. Plate XII, Figs. 5—8. 
Spec. Char. —Snout rather pointed; extremity of maxillary intersecting the noddle of the pupil. Eyes rather large. Base 
of pectorals even with the base of ventrals. Blotches of dorsal region assuming a fenestrated disposition. 
283. San Diego, California. Lieutenant W. P. Trowbridge. 
5. CHIROPSIS CONSTELLATUS, Grd. 
Gen. Rep. 42. Plate XIX. 
Spec. Char. —Dorsal fins contiguous. Caudal fin posteriorly sub-concave. Anal exteriorly rounded, or convex. Scales on 
th middle of the flanks conspicuously larger than elsewhere. Greenish-brown with groups i>f black dots on the anterior part 
body and sides of head. Pectorals densely dotted with black. 
264. San Francisco, California. Dr. A. L. Heermann. 
