90 RAFINESQUE’S 
Fossil shells. Orthoceratite 1 sp. Gryphites 3 sp. Diclisma 3 sp. 
Productus 6 sp. Terebratulite 8 sp. Eurytes 3 sp. Gonotrema 2 sp. 
Diclipsites 4 sp. Trunculites 8 sp. Pleureterites 10 sp. &c. a 
This last is a fine N. G. quite prolific in sp. it differs from Pro- 
ductus by being inequilateral. Nay it may be the type of a new 
tribe, since one sp. which I have called Pl. stellata having a bilobed 
hinge and a quadrifid shell might also form a peculiar G. Hemiste- 
rias quadrifida. ©O.8. R. 
[From the Atlantic Journal and Friend of Knowledge. No. IV., page 
142. Philadelphia, 1832.] 
[142] 
New Fossil Shells of Pennsylvania, by C. 8S. Rafinesque. 
Among the 40 N. sp. of Bivalve fossils 
found this year on Sherman er. in the 
Alleghany mts. I select those’which are 
unequilateral as the most curious, and I 
shall describe 10 of them giving above 
the figures of 7, ranged under 3 new 
genera. All are Inequivalve. 
1. N. G. Hemisrertas Raf. Shell 
transversal with 2 wings thus unequilate- 
ral, hinge with 2 teeth and an angular 
Sinus outside at the beak, margin lobed 
Hf. quadriloba fig. 1. Four obtuse 
lobes and 3 obtuse sinusses, lateral lobes 
like wings one much longer, an oblong 
furrow on each lobe, length half of 
breadth. 
2. N. G. Teuistropuis Raf. Shell 
unequilateral transversal with one wing on the longest side, hinge 
without beak, straight with a round impression inside at the apex, 
margin unlobed—¥Z. forsala fig. T. Shell convex, minute longitudi- 
nal curved strias, short side rounded, long side with a twisted 
obtuse wing, length 2-5ths of breadth.—Impression in Petrosilex, 
one inch. 
3. N. G. Pievrererires R. Shell unequilateral transversal with- 
out wings, hinge more or less curved simple or with a wrinkle and 
a beak, margin unlobed.—The name means irregular sides, Telistro- 
phis means spotted hinge, and Hemisterias means half starry— 
8 sp. 
