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THE AMERICAN NATURALIST [Vol. X'LVI 



In a carefully written paper (11) Andrews sets forth 

 the possibilities of crayfish propagation. 



He states that, from the small region on the Potomac 

 between Washington and Fort Washington, it was esti- 

 mated that there were half a million crayfish sent 

 annually to New York. 



New York, New Orleans, Chicago, Milwaukee and 

 San Francisco, and many other large cities consume 

 large quantities as food. 



In 1902, the TJ. S. Fish Commission reports state the 

 crayfish catch of Monroe Co., Florida, was 55.664 pounds, 

 worth $3,382. 



In Oregon, 116,400 pounds, worth $7,760, were caught 

 in one year. 



With crayfish maturing in one season and growing to a 

 length of from four to five inches in three years ; and con- 

 sidering the large number of eggs (100-600) laid by one 

 female, there should be but little difficulty in supplying 

 a large demand for these animals. 



When we consider that the large Astacus readily 

 adapts itself to the slight difference in environment in 

 the east, we see that the crayfish is a very practicable 

 substitute for the lobster. 



There should be no difficulty in disposing of the 

 smaller Cambarus, either as fresh food or canned, as we 

 get the abdomens of shrimps. 



In the school and college laboratories, the anatomy of 

 the crayfish has been studied ever since Huxley wrote 

 1 4 The Crayfish." The habits and activities of the young 

 and adult crayfish are of great interest and profit for 

 study. The animal is suited for many kinds of experi- 

 ments, and the large ganglia and nerve cells are readily 

 removed and are excellent for neurological work. The 

 psychologists should find a profitable subject for study 

 in the relations of mother and offspring for the few days 

 just after the young are detached from the mother's 

 swimmerets. 



Daily Li'/e.— From a lengthy series of observations, 



