CRABS, ETC. 



FIG. 89. Early stages of a barnacle. A, shortly after leaving the egg; 

 *?, eyes. B, having acquired a bivalve shell, and just before becom- 

 ing attached, represented upside down. C, appearance after becoming 

 attached side-view. Z>, top-view of still later stage, with the shell 

 forming around it. E, side-view of later stage, showing appendages 

 protruded. (The little marks at the sides of the figure?, indicate the 

 natural size of the object. A, B, highly magnified ; all of these views are 

 magnified, and, with the exception of Z> ? are reduced from figures of 

 C. Spence Bate.) 



2 



FIG. go. A Lernaean (Tr ache Hastes) of a fresh-water fish (Cyprincz}. i, 

 larva, as it leaves the egg. 2, larva, more advanced. 3, adult female, 

 showing the egg-sacs. (Nordmann.) 



