Lorraine Faunas of New York and Quebec 299 
from Lorraine, with most of the anterior ear and posterior wing- 
missing. This Fterinea probably suggested part of Hall’s de- 
scription: ^Tn specimens not compressed, there is an obtuse 
oblique carina, extending from the beak to the posterior margin 
above the base.” Since Hall’s type proves to be a Fterinea de- 
missa, his species evidently has no standing. Figures 2b and 2c 
on plate 82 represent two more species included by him under 
the term curia. 
32. Whitella securiformis, sp. nov. 
{Plate I, Fig. 1) 
Shell rotund quadrangular in outline. The greatest diameter 
from the hinge-line to the basal margin is 47 mm., while the great- 
est length is about 55 mm. The outline is strongly rounded both 
where it turns from the hinge-line posterior to the beak toward 
the posterior margin, and also from the latter toward the basal 
margin, but, in a general way, the hinge-line may be said to form 
an angle of about 110 degrees with the posterior margin, and the 
latter an angle of about 75 or 80 degrees with the basal margin. 
Anteriorly, the basal margin rounds evenly into the broadly con- 
vex anterior margin. In outline this shell most nearly resembles 
Whitella subovata, Ulrich, but the basal and posterior margins are 
somewhat straighter and hence the lower posterior part is more 
angular. The shell is only moderately convex, the convexity of 
the single valve being about 11 mm. The beak is broken off, 
but enough remains to indicate that the umbonal ridge was only 
slightly developed, the angularity between the umbonal parts and 
the cardinal slope being but poorly defined even in the immediate 
vicinity of the beak. In other individuals it may have been 
greater, but it is scarcely likely that in any specimens the strong 
angularity seen in the majority of the species of this genus, toward 
the beak, ever was present. The beak probably projected only 
about 3 mm. beyond the hinge-line. The shell is ornamented by 
concentric striae which are fainter toward the hinge-line. 
Type. From Hiviere des Hurons, collected by James Richard- 
son. Listed in the general report on the Geology of Canada pub- 
lished in 1863, under the name Modiolopsis securiformis, and 
