FISHES OF SACRAMENTO-SAN JOAQUIN BASIN. 147 
toral 0.26 to 0.29 of body, about reaching front of anal, the upper rays but little graduated, the eighth 
to twelfth from bottom nearly even, the upper ray 1.75 to 1.8 in longest (2 to 2.5 in klamathensis and 
2 to 2.5 in gulosus). The variation in fin rays is shown in the following table: 
Number of specimens having— 
Locality. | Spinous dorsal. Soft dorsal. Anal. 
| vit. | vini. | EO paGh LAN Aa eee aes 15. 
—_ = = = = | = = 
| | 
ID Tks eens Meat See Soda Da eeeoter ao re ap ere eae Se 15 4 3 13 3 | 5 12 2 
ORT DEMRU Ke MNG Notas eee eae Soren. Sees tos actey kane | 1 1 Se | V4 ae aoe 25) Wee 
Skin without prickles. Lateral line not extending beyond middle of soft dorsal. Color brownish 
olive with 5 or 6 dusky blotches on sides, one being at base of caudal; all fins dusky, except some- 
times the ventrals; a black blotch on posterior part of spinous dorsal, a more or less brownish or dusky 
blotch in front of base of pectorals; all soft fins vertically barred; one or two dusky bars downward 
and backward from eye. 
This species is most closely related to klamathensis, but is a heavier fish, the eye is larger, the head 
not so pointed, and the dorsal is inserted slightly more posteriorly. In five specimens of each species, 
of equal sizes, the distance from the snout to dorsal was in macrops 0.37, 0.38, 0.38, 0.38, and 0.39 of 
Fig. 4—Cottus macrops, new species. Type. 
the body length, while in klamathensis the same measurements were 0.36, 0.36, 0.36, 0.365, and 0.365. 
It differs from gulosus, with which it is found, in the above characters, besides having a more broadly 
rounded pectoral, incomplete lateral line, and a skin entirely free from prickles. 
Known only from Fall River, where it is associated with Cottus gulosus and Cottus asperrima, 
but more common than either. Here described from 19 specimens from Fall River at Dana, col- 
lected by Rutter and Chamberlain, the largest specimen being 2.8 inches long. Named with refer- 
ence to the large eyes. Type no. 58499, U. S. National Museum. 
27. Cottus beldingii Higenmann & Eigenmann. 
Cottus beldingii Eigenmann & Eigenmann, Amer. Nat., vol. Xxv, 1891, p.1132, Lake Tahoe and Dormer Lake. Jordan & 
Evermann, Fishes N. & Mid. Amer., pt. 11, p. 1958, 1898. 
A Truckee Basin species with entirely smooth skin, no palatine teeth and short fins. Found in 
only one locality in the Sacramento Basin, Cole Creek near Sierraville, where it was collected by Rutter 
and Chamberlain. Fin rays as follows: 
Dorsal: Specimens. | Dorsal: Specimens. 
Rays— 
2 OY oe. sere ann aw ee eu walnins Aeceninn eves sinninientaas 4 
17 | Anal: 
2 1D ees ees nana ae nines ae seein els nine ene ate aie gn or 8 
NS epee oo ace tagtee paar = Sanne ener ante = foie ene ee 12 
5 14 oon scene seme w tte ne waen ne sanans ans daetinwnenes ascete 1 
