106 BULLETIN OF THE BUREAU OF FISHERIES. 
extremity lies in nearly the same latitude as Chicago and its southern in about that 
of Memphis, Tenn. The distance from either of the extreme river sources to the 
Golden Gate is nearly as great as that from Chicago to Cairo, Ill. The general direc- 
tion of the San Joaquin, or southern portion of the basin, is southeast to northwest, 
that of the Sacramento portion nearly north to south. 
Part of the table-land of northeastern California is drained by Pitt River, which 
cuts through the Sierra Nevada near the northern end of the range and joins the 
Sacramento in the foothills at the northern end of the valley. This adds a consider- 
able area to the central drainage system. The tributaries draining the west side of 
the basin are small, and are dry in their lower courses for most of the year. The 
eastern tributaries are numerous and several of them are of considerable size. The 
larger tributaries of the Sacramento, named in the order of their size, are: (1) Pitt 
River, (2) Feather River, (3) McCloud River, and (4) Fall River (the latter two being 
tributaries of Pitt River), (5) Upper Sacramento (above mouth of Pitt River), (6) 
Battle Creek, and (7) American River. Those of the San Joaquin are (1) Kings, 
(2) Upper San Joaquin, (3) Merced, (4) Mokelumne, (5) Kern, (6) Tuolumne, and 
(7) Stanislaus rivers. 
SYNOPSIS OF STREAMS. 
Following is alist of the principal streams of the basin, italics indicating those in 
which collections have not been made. Smaller streams are mentioned if fishes have 
been reported from them. The tributaries are named in order, beginning with the 
lowest of the right bank drainage and going upstream and around the basin, coming 
down on the left bank. Secondary tributaries are named in the same order. The 
indentions indicate the relation of the various streams. When the particular point 
from which fishes have been reported is known, it is given after the name of the 
stream. If fishes have been reported from more than one point, the different stations 
are listed in order, beginning with the lower. 
Suisun Bay (Benicia, Martinez, Dutton). 
Sacramento River (Collinsville, Rio Vista, Ryde, Walnut Grove, mouth of American River, mouth 
of Feather River, Knights, 20 miles below Grimes, Wilson Farm, 4 miles above Grimes, Colusa, 5 
miles below Princeton, Butte City, Jacinto, Chico, mouth of Deer Creek, mouth of Thomas Creek, 
Tehama, 6 miles below Red Bluff, Red Bluff, mouth of Battle Creek, near Fort Reading, mouth 
of Clear Creek, Redding). / 
Fresh-water lagoons (locality not stated). 
Putah Creek. 
Aitna Springs. 
Cache Creek. 
Clear Lake, 
Allen Springs. 
Stoney Creek. 
Thomas Creek (at mouth). 
Elder Creek. 
Red Bank Creek. 
Cottonwood Creek (Cottonwood). 
Clear Creek (at mouth). 
Upper Sacramento River (Sims, Dunsmuir, Sisson, at source). 
Lake (near source of river). 
Cliff Lake. 
