See Say on Shells, &e. 
The several different Jeers exhibited by specimens 
of the Pentremite may be thus ed— 
ist. Pelvis abrubtly attenuated, ‘ditty horizontal— 
Length from seven tenths to more than half an inch. 
Kentucky Asterial fossil, Park. Org. Rem. vol, 2, pl. 13. 
This is the most common. 
2d. Body oblong ; seeded gradually attenuated ; transverse 
elevated lines of the ambulacra, groove 
ength from thifex “Soiitttis to one inch Pie one fourth. 
3d. Body subglobalar ; ; pelvis hardly more attenuated than 
Less common than the preceding one 
In Peale’s Museum a large specimen of the latter is pre- 
served, of which the sutures, have each a parallel impressed 
line on each side; this specimen was brought from 
by Mr. Reubens Peale, he was informed ‘that it was found 
in the vicinity of Bath, but the fact is very equivocal. 
A specimen of the ‘second variety is in the eet of 
Mr. B. Say ; it was presented to him several years ago un- 
der the name of petrified althea bud, and was fae i ina 
garden in the borough of Reading, Pennsylvania. 
Mr. Z. Collins informed me that this fossil has been 
noticed and figured, by Dr. S. L. Mitchell, of New-York, 
as an Echinus of the family (genus) Galerite, and also as an 
asterite. See his geological observations in the New-York 
edition of Cuvier’s theory as translated by Jameson p. 363, 
pl. 8. This figure indicates the above first variety. 
Renilla Americana, 
Is very common on the coast of Georgia and E. Florida, 
cast up by the waves. 
Perna torta. 
This large species of fossil Perna has been discovered at 
Upper Marlborough, in the state of Maryland, by Mr. 
Gilliams of this city. The hinge portion is very entire, but 
the anterior part, is more or less broken off, as is the case 
with those found in Europe and like them the substance of 
the shell is in a tolerable state of preservation, not having 
oat | op A al a ae al 
SEEM groin 
"7 
