CONTRIBUTIONS 
OF THE 
MACLURIAN L7CEUM 
TO THE 
ARTS AND SCIENCES. 
Vol. I. 
JULY, 1827. 
No. 2. 
CONTENTS. 
Page 
Remarks on some Reptilia of Dr. Harlan. By Thomas Sat, 37 
Note on Le Conte's Coleopterous Insects of North America. 
By Thomas Sat, 38 
Reply to a Note in Harlan's Synopsis of American Reptiles. 
By Jacob Green, A. M. - - - - - - - 39 
On the Unios of the United States. By Jacob Green, A. M. 41 
New Species of Achatina, with remarks on the Ti, or the 
Dracebta terminalisj of the Sandwich Islands. By Jacob 
Green, A. Mf. - - - - - - - - -47 
On Pyroxene. By G. Troost, M. D. = - - - - 51 
And two Plates. 
PHILADELPHIA: 
SOLD FOR THE MACLURIAN LYCEUM BY J. DOBSON, 108 
CHESNUT STREET; G. & C. CARVILL, BROADWAY, IsTEW 
YORK; JOHN mLLER, LONDON; AND J. B. BAILLIERE, 
PARIS. 
J. RICHARDS, PRINTER. 
1827. 
