158 CLASS CRUSTACEA. 



ancient naturalists. By the moderns they are sometimes 

 named land-crabs, [Cancer cursor, Linn.) In some others of 

 them the eyes terminate the pedicles, and form a sort of knob. 

 Some of the old continent (O. Rhomhea, Fab.), and all of the 

 new, are in this case ; but the latter have a peculiar charac- 

 ter, announcing that they visit the water more frequently, or 

 swim with greater facility ; their feet are more even, more 

 flatted, and furnished with a fringe of hairs. 



In the next, the testa, at least in the females, is very slender, 

 membranaceous, and flexible ; the body is almost round or 

 sub-ovoid. The ocular pedicles are sensibly shorter than in 

 the preceding subgenera. 



At first come, 



MiCTYRTS, Latr. 



Their body is sub-ovoid, very much inflated, more naiTow 

 and obtuse in front, truncated posteriorly, with the hood much 

 lessened, and narrowed into a point at its extremity. The 

 claws are elbowed at the junction of the third and fourth arti- 

 culation ; this latter is almost as large as the hand. The other 

 feet are long, with the tarsi angular. Add to these essential 

 characters, that the ocular pedicles are curved, and crowned 

 with globular eyes ; that the external jaw-feet are very am- 

 ple, very hairy at the internal edge, with the second articula- 

 tion very large, and the following almost semi-circular. 



Immediately after Mictyris we shall place 



Pinnotheres, Latr. 



Very small Crustacea, living for a part of the year in divers 

 bivalve shells. The testa of the females is suborbicular, very . 

 slender, and very soft, while that of the males is solid, almost 

 globular, and a little narrowed into a point in front. The 

 feet are of moderate length, and the claws are straight, and 



