216 HANDBOOK OF INVERTEBRATE ZOOLOGY. 



blance to small crabs. Catch two or three specimens with 

 a dipping-tube, and place them in a tumbler of sea-water, 

 where they may be kept alive for examination. 



a. Place one of them in a watch-crystal, in enough sea- 

 water to cover it, and, examining it with a low power, 



FIG. no. 



FIG. 110. Megalops of Callinectes or of a closely-allied crab, magni- 

 fied about eighty diameters. (Drawn from nature by W. K. Brooks.) 



A. Antennule. An. Antenna, ab. Abdomen, c. Carapace. E. Eye. 

 pr. 5, Fifth pereiopod. r. Rostrum. L Fifth thoracic somite. 



notice that it differs from the zoea and resembles the full- 

 grown crab in the following respects : 



