ZOOLOGY. 
27 
five scales in lateral line. Ash or greyish hrotvn above. Sides and belly dull yellow or white. 
A diffused spot upon the anterior third of the anal. Other fins yellowish. Tip of pectorals 
blackish or deep purple. 
List of specimens. 
Catalogue 
No. of 
Sex and 
Locality. 
When 
Collected by—- 
Original 
Nature of spe- 
number. 
specimens. 
age. 
collected. 
number. 
cimens. 
553 
i 
Adult. 
Astoria, Oregon_ 
1856 
Lieut. Trowbridge_ 
. 
Alcoholic. 
XVI. FAMILY CYPMNIDAE. 
49. MYLOCHEILUS CAURINUS, Grd. 
Plate XL'VI, figs. 1-4.— General Report upon Fishes. 
Snout rounded and subconical, though rather blunt. Posterior extremity of maxillary ex¬ 
tending to a vertical line drawn across the posterior rim of the nostril. Anterior basal edge of 
ventrals situated opposite the third developed ray of the dorsal. Brownish black above ; yel¬ 
lowish gold beneath ; two lateral darker bands, the inferior one extending no further back 
than the vent. 
“ Columbia river Dace.” 
List of specimens. 
Catalogue 
Correspond’g 
No. of 
Sex and 
Locality. 
When 
Collected by— 
Nature of spe- 
number. 
numbers. 
specimens. 
age 
collected. 
cimens. 
213 
2770,2771 
12 
Adult. 
Astoria, Oregon_ 
1855 
Lieut. Trowbridge 
Alcoholic. 
50. MYLOPHARODON ROBUSTUS, Ayres. 
Plate XLYII.— General Report upon Fishes. 
Upper surface of head very declivous; snout tapering, almost wedge shaped. Posterior ex¬ 
tremity of maxillary extending to a vertical line drawn across the anterior rim of the orbit. 
Eye of medium size. Pectoral and ventral fins broad and stout. Anal fin nearly as large as 
the dorsal. Ground color olivaceous, darker above than below. 
Sold in the markets of San Francisco under the name of lc Salmon Trout.” 
List of specimens. 
Catalogue 
number. 
Correspond’g 
number. 
No. of 
specimens. 
Sex and 
age. 
Locality. 
When 
collected. 
Collected by— 
Nature of spe¬ 
cimens. 
244 
2796 
i 
Adult. 
San Francisco, Cal._ 
1855 
Dr. Newberry_ 
Alcoholic. 
