FISHES OF SACRAMENTO-SAN JOAQUIN BASIN. 119 
TT. Tail more slender, sides with a red stripe. Size about 4 
Inches yess 55 osee esate Sora se LEUCISCUS EGREGIUS 
SS. Pharyngeal teeth in one row. 
V. Body much compressed, anal rays 11 or 12 
° LAVINIA EXILICAUDA 
VV. Body but little compressed. Anal rays about 8. 
W. Pharyngeal teeth 5-5 or 4-5............... Rutitus 
X. Body more compressed, tail heavier, its depth 
about .12 of body length... - RvutiLus BICOLOR 
XX. Body more nearly round; tail more slender, 
about .09 of body..-.-- RutiLus SYMMETRICUS 
WW. Pharyngeal teeth 44. Small fishes, less than 4 
miele Whole Seok ae eo as AGOSIA ROBUSTA 
NN. Anal fin with about 20 rays. Shad...............ALOSA SAPIDISSIMA 
II. Jaws with teeth. 
a. Adipose fin present, fins without spines. 
b. Seales small, over a hundred in lateral line. Salmons and trouts. 
Gama rinlcninuw Une ALON fray ese fae sine ce since =o oo see oe ONCORHYNCHUS 
d. Scales very fine, over 200 cross series above lateral line 
ONCORHYNCHUS GORBUSQHA 
dd. Scales larger, 138 to 155 cross series, pyloric cceca about 150. 
e. Anal 13 or 14, black spots obsolete, branchiostegals 13 or 14 
ONCORHYNCHUS KETA 
ee. Anal 16, back and upper fins with smaller black spots, branchiostegals 
15 to 19 CORHYNCHUS TSCHAWYTSCHA 
ddd. Scales large, 125 to 135 cross series, pyloric cceca 50 to 80 
ONCORHYNCHUS KISUTCH 
cc. Anal fin with 9 to 12 rays. 
iiemocaleselilotouliip een +- ioe. ass soe ac cs) oe SALMO IRIDEUS 
Vpsupcalessaboutea 0s soe see tices tee desh ease SALVELINUS MALMA 
bb. Scales large, about 70 in lateral line................ OSMERUS THALEICHTHYS 
aa. No adipose fin; dorsal and anal with spines. 
g. Scales cycloid; viviparous ..............- HystTEROCARPUS TRASKII 
gg. Scales ctenoid; oviparous. 
h. Side of body without longitudinal stripes 
ARCHOPLITES INTERRUPTUS 
hh. Side of body with longitudinal stripes... .... Roccus LINEATUS 
NATIVE FRESH-WATER SPECIES. 
1. Entosphenus tridentatus (Gairdner). Lamprey. 
Petromyzon tridentatus Gairdner, in Richardson, Fauna Boreali-Americana, p. 293, 1836, Falls of the Willamette. 
Petromyzon ciliatus Ayres, Proc. Cal. Ac. Sci., 1885, p. 44, San Francisco. 
Entosphenus ciliatus Gill, Proc. Ac. Nat. Sci. Phila., 1862, p. 331, San Francisco. 
Entosphenus epihexodon Gill, Proc. Ac. Nat. Sci. Phila., 1862, p. 331, Fort Reading. 
Lampetra, sp. incert., Jordan & Henshaw, Wheeler Survey, Report U.S. Geological Survey, 1878, p. 187, Goose Lake. 
Entosphenus tridentatus, Jordan & Evermann, Fishes of North and Middle America, Bulletin 47, U.S. Nat. Mus., p. 13,1896. 
This is an anadromous species that has become landlocked in Goose Lake and Clear Lake. A 
specimen 7 inches long from Goose Lake has the fringe of the buccal disk a little heavier than a speci- 
men of the same length from Pacific Grove; otherwise the two can not be distinguished. Jordan & 
Henshaw’s larval Lampetra from Goose Lake was doubtless this species. 
The adults can be distinguished from Lampetra cibaria by the presence of a tooth in the middle of 
the supra-oral lamina in addition to one at each end. 
