140 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



May and June, but farther south, as in Chesapeake Bay, the spawning 

 season is somewhat earlier. This species attains a length of over two 

 inches, exclusive of the feelers, but generally occurs much smaller than 

 this. So i'iir as we are aware, it is not captured for food south of New 

 York, although it has been found in extreme abundance and of good 

 size in Chesapeake Bay and elsewhere south, by the U. S. Fish Com- 

 mission. In its favorite haunts it frequently occurs in vast numbers, 

 and may be readily captured in marketable quantities. 



On the California coast, according to Mr. W. N. Locking ton, Crangon 

 vulgaris occurs, associated with another species of the same, genus 

 (Crangon franciseorum), which excels it in size and generally in abun- 

 dance. The average length of specimens there is said to be about '-'.'; 

 inches; a length of over 3 inches is sometimes attained. It is distin- 

 guished from Crangon frandscorum in having a darker-colored tail and 

 a larger proportion of black markings upon the body, as well as by the 

 different form of the hand or larger claw. From its black coloring it 

 has received among fishermen the name of black-tailed crab. 



The California SnniMP. Crangon franciscorxm, Stimpson. 



This species, according to Mr. Lockington, is the shrimp par excellence 

 of the San Francisco markets, where it is sold during nearly every month 

 of the year. It averages in length from 3 to3J inches. The characters 

 by which it is distinguished from Crangon vulgaris have already been 

 enumerated. Its range, so far as determined, is very limited, being from 

 Puget Sound to Point Conception. In San Francisco and Tomales Bays 

 it is very abundant, frequenting especially the sandy coves along the 

 shores. It is fished for mainly by the Chinese, both for consumption in 

 California and for shipment to China. 



A third species of shrimp, Bippolyte brevirostris, of a uniform light 

 crimson or scarlet color, occurs in small quantities in San Francisco 

 Bay, and is frequently captured along with the two species of Crangon 

 and sold with them. 



The Southern Shrimps and Prawns. Penwus setiferus, M. — Ed- 

 wards; Tenants brasilicnsis, Latr. 



These two closely related species compose the bulk of the large Sup- 

 plies of shrini)) or prawns consumed in New York and the soul hern 

 coast cities. They frequently occur associated together in the same 

 localities, and, being so nearly alike in appearance, are not distinguished 

 apart by the fishermen and dealers. Penceus setiferus is supposed l<> 

 he the more abundant species; it attains a length of <> or more inches, 

 exclusive of the feelers, and may measure more than three fourths of an 

 inch iu depth and breadth, in the front or body part. Strangely enough 

 these useful crustaceans are known both as shrimps and prawns to the 

 fishermen who take them, as well as in the markets, the distinction 



