4 
Lr A 
A. é 
the Family Duteodesmacea. 143 
ference in the figures given by Wood, Turton and 
Brown ; and their descriptions all agree, in the essential 
particulars, with a fine specimen from the Devonshire 
^ coast in my possession, to which hardly a point in the 
descriptions of T. pubéscens i is applicable. From T. 
Courádi, Nobis, this s t differs, by its ochreous epi- 
dermis, and the form of t posterior extremity, as well 
as in having that portion o of the palleal impression exca- 
vated in a more circular form. In other respects they 
resemble each other considerably, and it would not be 
strange, if with the plate alone before him, a person. : 
should suspect & correct figure of T. convéza to be an - 
indifferent one of T. Conradi. 1 am not aware that 
the British species has ever been found on our shores — 
ee from causes alluded to under the remarks on 
T. Conrádi, it has been. usually supposed ` to exist bus. 
PE y v 
THRACIA CORBULOIDES. kg 
Plate V. Fig. L 
Th. testa ovato-transversi, grisea, inæquivalvi, cae, bisin- 
uata, Membri nagnis, inferiore emarginatà. (Desh.) 
w^ 
"Thracia corbuloides, | Dasuaves, Dict. Class. d Hist. 
Nat. tom. 16, “atlas iv. fig. 4. 
Idem. De NE. Manuel y dece p. 565, 
tab. 25 f. As x 
Idem. Desu. Encyc. Meth. Vers, in. p. 1039, No. 1. 
Lam. Anim. sans Vert. ne Desh. 1835, . 
* 
act 
