U)G CALII'OHXIA FISH AND GAME 



The newly described sjjeeies is an isolalcd \;iiiiiii1 of N. In nslnnvi, 

 differing' markedly in tlie a])sence of spots fi'oni tlie body, the more 

 sU^nder I'oriu and the rebitively small and inoi'e numci'ous scales. 



The oiitstandiny characteristic of Ibis ti-ont is the color, well 

 portrayed in the reproduction of a i)aintin<r by Cbloe Lesley 8tarks. 

 No two observers aiiree in a desci'iption of its colors, tints and sliades, 

 some of winch seeminyly come and go with every changing whim of the 

 fish. Moreover, its swimming movements are often accompanied with 

 opaline reflections of varied intensity, and the skin in some places has 

 a peculiar translucent ai)i)earance, so much so that on the head some 

 of the cranial bones are partly outlined through the overlying tissue. 

 A sudden disturbance will occasion the appearance of much green 

 color on the bod}', thus imparting a greenish olive to the dorsal surface 

 and a paler green to the region below the lateral stri])e. The venti'al 

 surface may at times darken considerably. 



The normally clear white ventral surface is unusual, particularly 

 on the throat where it forms an advantageous background for the 

 extensive orange red areas beneath the mandible. As in the case of 

 other cutthroats, an occasional example bears one or more small, 

 golden, coin-like spots, located anywhere, but usually on the ventral 

 surface. There are no dark spots on the body and they are not niiiner- 

 ous on the dorsal and caudal. Tn some examples the caudal is almost 

 immaculate. The major parr marks are ten in number, the first inune- 

 diately bordering the gill opening, the last at the end of the caudal 

 peduncle. All are crossed by the lateral line, the posterior ones 

 bisected by it, the anterior ones two-thirds below. Of the secondary 

 row, sixteen in number, every alternate si)ot dips between the nearby 

 jirimary ones. The mid dorsal region is marked by a narrow dark 

 line. 



The body is comi)aratively long and slender, so much so as to 

 attract attention at once. The fins are rather weak. 



Proportional measurements were made of each of ten specimens 

 of S. seleniris from its restricted habitat presently to be described, and 

 also from a like number of 8. hcnshawi from Silver King Creek, a 

 tributary of Carson Iviver. Averages of each ten are here given, the 

 column marked "S" representing ^. seleniris. Considerable dift'erence 

 ap{)ears. pai-licnlarly in the depth of the body. 



.S". 11. 



standard lenRlh in niillimcler.s 160.4 1C1.7 



Lengtli head in hundredths of .standard length .254 .262 



Depth Iiody ".198 '.235 



Depth caudal peduncle .099 .110 



Length caudal peduncle .159 .164 



Length maxillary .141 .147 



Length snout .065 .068 



Diameter eye .05 .049 



Interorl)ital width .078 .077 



Depth head .163 .165 



Snout to occiput .172 .167 



Snout to dorsal .508 .514 



Snout to ventral .549 .547 



Length base of dorsal .123 .144 



Length base of anal .108 .112 



Height dorsal .155 .160 



Height anal .149 .145 



Length pectoral .166 .179 



Length ventral .138 .145 



Length caudal .198 .215 



Dorsal rays 10.0 10.8 



Anal rays 10.6 10.3 



Scales lateral series 170.9 167.6 



Scales above lateral line 30.1 29.7 



