THE FISHES OF THE STREAMS TRIBUTARY TO MONTEREY BAY, 
CALIFORNIA. 
By JOHN OTTERBEIN SNYDER, 
Stanford University, California. 
J- 
INTRODUCTION. 
The present paper deals with the fishes of the streams tributary to Monterey Bay, 
Cal. It contains a systematic record of the species, a discussion of their relationships, 
and an attempt to account for their present distribution. It involves some of the 
results of a prolonged investigation of western fluvial fishes which has been based pri- 
marily on material collected by agents of the United States Bureau of Fisheries. In 
connection with this study the writer has on several occasions visited the principal 
streams flowing into Monterey Bay, each time making observations and preserving 
specimens of the fishes. The early work was under the direction of Dr. Charles H. 
Gilbert, and assistance in the field was ably rendered by Dr. J. M. Stowell, Messrs. 
Wilfred H. Osgood and James A. Gunn. In the summer of 1909 the writer, assisted 
by Messrs. Willis H. Rich and Carl H. Gilbert, students of Stanford University, made 
a more complete survey of the system and collected large series of specimens. The 
well-preserved material obtained at this time has been most useful in determining the 
characteristics of the Pajaro species. 
A microscopic examination of the scales has in some cases revealed reliable specific 
characters, and photographic illustrations are given. The proportional measurements 
of specimens are recorded in hundredths of the length from tip of snout to end of last 
caudal vertebra. They were made with considerable care by means of dividers and a 
proportional scale. The drawings of fishes are by Mr. W. S. Atkinson. 
THE STREAMS TRIBUTARY TO MONTEREY BAY. 
The streams that flow into Monterey Bay diverge from the coast like the fingers 
from the palm of one’s hand. Beginning with the most northern, they occur in the fol- 
lowing order: San Lorenzo River, Soquel Creek, Aptos Creek, Pajaro River, and Salinas 
River. Soquel and Aptos Creeks are of minor importance, as they drain very small 
basins and are subject to considerable desiccation during periods of long drought. 
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