314 



U. S. p. R. K. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



pectorals are small and lanceolate. The rays of all the fins are more or less branched or bifur- 

 cated ; their formula reads : 



Br. 12: 12; D 13 ; ; A 13 ; C 7, 1, 9, 8, 1, 6; V 11 ; P 13. 



The anterior two rays in the dorsal fin are rather rudimentary, and so is the anterior one in 

 both the anal and the ventrals. 



Tlie scales are small, though not of the smallest kind in the genus. Their form varies 

 according to the regions where observed : on the dorsal region they are sub-elliptically elongated, 

 broader anteriorly than posteriorly ; in the lateral line, though similarly elongated, they are 

 narrow and rather pointed anteriorly, and broad and rounded posteriorly ; on the abdominal 

 region they are deeper than long and vertically sub-elliptical. Their central portion is cellular 

 in those of the dorsal and abdominal regions (figs. 2 & 4), whilst the concentric stria are 

 obliterated posteriorly in those of the lateral line (fig. 3). 



This species is almost unicolor ; the back is silvery grey, whilst the sides are of a pure silvery 

 hue and the belly yellowish white. The body is indistinctly speckled with black ; black spots 

 of a more conspicuous character are observed upon the dorsal and caudal fins, also at the end of 

 the tail> The inferior fins are greyish upon their base, and olivaceous towards their margins. 



The specimen figured and described was collected by Dr. Newberry, in Klamath river, Oregon. 



References to the figures. — Plate LXXI, fig. 1, represents Fario gairdneri, size of life. 

 Fig. 2 is a scale from the dorsal region, midway between the lateral line and the dorsal fin. 

 Fig. 3, a scale from the lateral line. Fig. 4, a scale from the abdominal region, midway be- 

 tween the lateral line and the insertion of the ventral fins. 



Figs. 2 — 4 are magnified 



views. 



List of specimens. 



5. FARIO CLARKII, Grd. 

 Plate LXXI, Figs. 5—8. 



Spec. Char — Rody Bub-fusiform ; head well developed, forming the fifth of the total length. Maxillary slightly bent, 

 extending to a vertical line drawn inwardly to the posterior rim of the orbit. Jaws equal. Anterior margin of dorsal fin a little 

 nearer the extremity of the snout than the insertion of the caudal fin. Back bluish grey ; upper surface of head blackish grey ; 

 sides silvery grey ; fins ash grey, dorsal and caudal spotted. Upper regions of head and body studded with irregular black spots 

 or specks. 



SvN. — Sa'mo clarkii, Richards. Faun. fior. Amer. Ill, 1836, 224. — Storer, Synops. 1846, 197. 

 Fario clarkii, Grd. in Proc. Acad. Nat. Sc. Philad. VIII, 1856, 219. 



The profile of the body is fusiform ; the head is sub-conical and proportionally well developed, 

 forming about the fifth of the total lengtli. The body itself, though compressed as usual in this 

 genus, is rather full, and the sides sub-convex instead of flattened. The mouth is moderately 

 cleft ; the jaws being even anteriorly and the posterior extremity of the maxillary extending to 

 a vertical line passing inwardly to the posterior rim of the orbit. The teeth are acute and 

 conical, largest on the tongue ; those on the lower jaw (dentary) are nearly equal in size, the 



