THE CRUSTACEANS 



91 



Fig. SS; SOl'TIICRN OH KDIULK SlllilMl". 



distinguished from Crangon vulgaris by tlie sharp-pointed, saw- 

 edged spine which projects forward between the eyes, its longer and 

 more delicate feelers 

 and slender legs. It 

 makes a good bait 

 for fishes, but is too 

 small to Ije vei'v val- 

 uable in the market. 



The Edible 

 Shrimp, f Pen ce n s 

 setiferus, Fig. 58), 

 is the praAvn or 

 shrimp of the south- 

 ern markets, where 

 it is highly esteemed 

 as food. It becomes 

 at least six inches 

 in length and ranges 

 from Virginia to 

 Texas. It appears 



in shallow bays and estuaries in the spring, and spawns during 

 the summer so that the young are commoidy found along shore 

 early in the autumn. Pence us setiferus may be recognized by its 

 long, saw-toothed spine Avhich extends above the back and projects 

 forward between the eyes. This ridge is bordered on both sides 

 by a deep groove which extends about half way down the back. 

 In another and rarer species called Penceus hrazilensis these grooves 

 extend down the entire length of the shell. This form extends 

 from New York to Brazil, and it often ascends rivers, living even in 

 fresh water. Both species are protectively colored being moi^e or 

 less translucent brown, or mottled. The feelers are about a foot 

 Icmg and there are small claws at the ends of the first three pairs 

 of feet. The southern shrimp fishery is worth more than ^100,000 

 annually. 



The Coral Shrimp, {StenopushispidusJ. This beautiful shrimp 

 is white, with three bands of bright scarlet across the body and four 

 across each of the clawed arms. The body is about three inches 

 long and is covered with short, sharp spines. The feelers and clawed 



