CRABS, ETC. 83 
e, eyes. #8, having acquired a bivalve shell, and just before becom- 
ing attached, represented upside down. C, appearance after becoming 
attached—side-view. D, top-view of still later stage, with the shell 
forming around it. Z, side-view of later stage, showing appendages 
protruded. (The little marks at the sides of the figures indicate the 
natural size of the object. .4, B, highly magnified ; all of these views are 
magnified, and, with the exception of D, are reduced from figures of 
C. Spence Bate.) 
Fic. 90.—A Lernzan (7racheliastes) of a fresh-water fish (Cyprime@). 1, 
larva, as it leaves the egg. 2, larva, more advanced. 3, adult female, 
showing the egg-sacs. (Nordmann.,) 
