HYAS COARCTATUS. 
Tab. XXI. b. 
H. testa lateribus coarctatis, processu hastiformi potice valde dilatato inermi. 
Ilyas coarctatus. Leach Trans. Linn. Soc. xi. 329. 
Fig. 1. Hy as coarctatus mas. 2. foemina. 
I discovered this species in the Frith of Forth; and on the southern coast of Devon; and I have 
received very fine specimens from a scientific friend; who took them off the coast of Kent, near 
Sandgate. 
It is always tound in very deep water; and is to be obtained by dredging. 
