PORCELLANA. 
79 
cronra. Fifth pair of legs filiform, small, folded up above 
the others. Sternal plate very wide, and nearly circular. 
Gen. 26. PORCELLANA, Leach . 
Carapace as wide as long, suborbicular, and depressed 
above. Eyes small. Outer antennae very long. Outer 
jaw-feet very large. Front legs very large, and more 01 
less flattened. Abdomen wide, folded under the carapace 
on the sternum, of seven distinct rings, and with a terminal 
swimming-fin of five plates. 
Porcellana platycheles, Penn. sp. Broad-clawed 
Crab. (Plate Y. fig. 4.) — Hands wide and flattened, their 
claws triangular. Forehead projecting, and divided into 
three flattened teeth, the middle one not grooved ; second, 
third, and fourth pairs of legs hairy. 
Common on the coast, under stones. 
Mr. Kingsley* gives the following picture of this Crab : 
— “ Turn a few stones which lie piled on each other at ex- 
treme low-water mark, and five minutes' search will give 
you the very animal you want, — a little Crab, of a dingy 
russet above, and on the under side like smooth porcelain. 
His back is quite flat, and so are his large angular fringed 
* Glaucus, or the Wonders of the Shore, p. 152. 
