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. 110. 



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, ah. Abdomen, c. Carapace. E. Eye. 

 pr. 5, Fifth pereiopod. r. Kostrum. t, Fiftli thoracic somite. 



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

 grown crab in the following respects : — 



