a ee Te ee ee ee ee + © a 
Ee MOE ES Wee ee Be 
Molluscan Fauna of New England. 287 
Astarte undata Gould, Inv. Mass., 1st ed., p. 79, 1840 (provis- 
ion : 
Astarte sulcata (pars) Gould, op. cit., and most American writers. 
Crassina latisulca Hanley, Recent Bivalve Shells, p. 87, pl. 14, fig. 35, 1843. 
This is by far the most abundant species on the northern 
coast of New England. It ranges from Cape Cod to Labrador. 
In the Bay of Fundy it is very abundant at all depths, from 
3 to 125 fathoms, on muddy bottoms. It varies greatly in form 
and sculpture, but can easily be recognized in all its varieties, 
by any one familiar with the species of this genus. The beaks 
are less prominent and the lunule less deeply excavated than 
in A. sulcata, and other differences exist in the hinge, ete. 
The figure in the new edition of Gould (fig. 482) is not charac- 
teristic, having been made from an old eroded specimen, of 
unusual, if not abnormal, form. 
Astarte lens Stimpson, MSS. 
that a ee with the original Portlandica, in color, form, and 
size, while other specimens are intermediate between these and 
be formed 
rounded angle; ventral margin prolonged and rounded in the 
. 
prolong 
middle ; posterior side with two strongly developed flexures, 
