88 U. S. p. R. K. EXP. AND SURVEYS — ROUTE TO CALIFORNIA. 



28. ENNICHTHYS EEERMANNI, Grd. 

 Gen. Rep. 199. Plate XXXVIII and Plate XXVI, Fig. 9. 



Spec. Char.— General form sub-elliptical ; snout sub-conical; mouth moderate ; posterior extremity of maxillary even with 

 a vertical line intersecting the centre of the pupil Eyes of medium size. Branchiostcgals six- About sixty-two scales in 

 lateral line. Back olivaceous, sides and abdomen silver and golden ; flank with indistinct transverse bars or bands. Fins 

 unicolor, yellowieh and greyish. 



549. San Francisco, California. Dr. A. L. Heermann. 



29. AMPHISTICHUS ARGENTEUS, A g a s s . 

 Gen. Rep. 201. Plate XXXIX. 



Spec. Cii.\n. — General form sub-elliptical, more convex above than below. Snout anteriorly rounded. Posterior extremity 

 of maxillary reaching a vertical liua passing behind the pupil. Anterior anal spines rather large. Sixty-eight scales in lateral 

 line. Branchiostegals, six. Bluish grey above, sides silvery with indistinct olivaceous transverse bands. Vertical fins and 

 ventrals olivaceous ; pectorals yellowish. 



557. San Francisco, California. Dr. A. L. Heermann, 



30. AMPHISTICHUS SIMILIS, Grd. 

 Gen. Rep, 203. Plate XXXVI, Figs. 5—9. 



Spec. Chab.— General form regularly sub elliptical. Snout sub-conical. Posterior extremity of maxillary reaching a 

 vertical line passing in advance of the pupil. Spinous portion of dorsal as high as the soft. Anterior anal seines rather small. 

 Branchiostegal rays, five. Bluish grey above; sides silvery. Dorsal and caudal greyish yellow; anal, ventrala, and pectorals, 

 dull yellowish. 



560. San Francisco, California. Dr. A. L. Heermann. 



31. MTLOPHARODON ROBUSTUS, Ay res. 

 Gen. Rep. 216. Plate XL VII. 



Spec. Char. — Upper surface of head very declivous ; snout tapering, almost wedge-shaped. Posterior extremity of maxillary 

 extending to a vortical line drawn across the anterior rim of the orbit. Eye of medium size. Pectoral and ventral fins broad 

 and stout. Anal nearly as large as the dorsal. Ground color olivaceous, darker above than below. 



244. San Francisco, California. Dr. John S. Newberry. 



32. MYLOPHARODON CONOCEPHALUS, Grd. 

 Gen. Rep. 216. Plate XLVI, Figs. 5—8. 



Spkc. Char. — Head sub-conical. Posterior extremity of uiaxillar bone not extending as far as the anterior rim of the orbit. 

 Eye well developed. Pectoral and ventral fins of moderate size. Vertical fin* well developed. Anal and dorsal much deeper 

 than long. Base of anal entering twelve times and a half in the total length. Brown above; whitish beneath. 



243. San Joaquin river, California. Dr. A. L. Heermann. 



33. ALGANSEA FORMOSA, Grd. 

 Gen. Rep. 240. 



Spec. Char. — Head contained four times in the total length. Eye moderate sized; its diameter entering five times in the 

 length of the side of the head. Posterior extremity of the maxillar bone corresponding to a vertical lino drawn behind the 

 nostrils. Anterior margin of dorsal fin equidistant between the extremity of the snout and the insertion of the caudal. 



