PISHES, LAHONTAN SYSTEM OF NEVADA AND NORTHEASTERN CALIFORNIA. 57 



Females are larger than males, their bodies are mote robust, and their fins are lower and shorter. 

 The largest individuals seen measured si inches. 



The food seems to consist mostly of aquatic larvae and winged insects. No alga or other vegetable 

 matter was found in the stomachs, except such as might have been swallowed by accident. 



The scales are very regular in size over the entire body; small, deeply embedded, and scarcely evi- 

 dent on the breast. There are from 52 to 61 in the lateral line, 54 to 59 being the usual number. The 

 following tables give the scale rows and fin rays in a number of examples: 



Careful measurements and a direct comparison of specimens reveal no characters peculiar to any 

 particular isolated basin. 



Measurements of 20 specimens follow. 



MEASUREMENTS OP RiCHARDSONIUS EGREGIUS. 

 FALLEN LEAF CREEK, NEAR LAKE TAHOE. 



Length of body mm. 



Length head 



Depth body 



Depth caudal peduncle. , 

 Length caudal peduncle. 



Length snout 



Diameter eye 



Interorbital width 



Depth head 



Snout to occiput 



Snout to dorsal 



Snout to ventral 



Length base of dorsal 



Length base of anal 



Height dorsal 



Height anal 



Length pectoral 



Length ventral 



Length caudal 



Dorsal rays 



Anal rays 



Scales lateral line 



Scales above lateral Une . 

 Scales below lateral line . 

 Scales before dorsal 



h 



0.25 

 •23 

 . 10 



•23s 

 .075 

 .06 

 •07s 



•535 

 .48 

 -13 



.185 

 .27 



5 

 o. 24 



.24 



. 10 



• 23 



.07s 

 .06 

 .08 



■■7 

 .19 



■53 



.48 



.105 



•125 



.19 



.18 



. 2t 

 •155 



•25 



8 

 9 



60 



Z2 



6 



30 



6 



o- 26 

 • 25 



.lis 



. 21 

 .075 

 .07 

 . 10 

 .19 

 . 21 



•55 

 •52 



4 

 0.34 



• 23 

 .105 



• 23 



■ 075 

 .06 

 .08 

 .18 



■ 20 



■ 52 



•47 



• 12 

 •13 

 •195 

 .18 



■ zl 

 .16 

 •255 



8S 



9 



0.25 

 •25 



• 10 



• 24 



• 06 



•OSS 



• 08 



• 18 

 •19 

 •S6 

 .48 



• 10 

 •125 



• 19 



• l6s 

 .19 



• 16 

 •25 



8 

 9 



59 



0.24 

 .24 

 . 10 

 .24 

 ■ 065 

 .06 

 .08 

 .18 

 .19 

 •S4 

 •SI 



• 115 



• 115 



• 14 

 .245 



0.25 

 .24 



•075 

 .06 

 .09 

 •17 

 •19 

 •54 

 •49 

 .125 



•17 

 .19 



•IS 

 • 24 



8 

 8 

 59 

 13 

 6 

 31 



