Arr. I. 
Art. II. 
Amr. IH. 
Art. IV. 
Art. V. 
Art, VI. 
Anr. VII. 
Art. VIII. 
Art. IX. 
ART. X. 
ArT. XI. 
ART. XII. 
CONTENTS. 
On the Embryology of Nemertes, with an Appendix on the 
Embryonie Development of Polynóe; and Remarks upon 
the Embryology of Marine Worms in general. By E. DE- 
SOR, Boston 1 
Descriptions and Tina of the E of the United 
ees Nıcuoras MamcELLus Henrz, Tuscaloosa, 
Alabama . (UIN 
Chemical Examination of some X morie Minerals, By de 
D. Wurrxzr, Boston 36 
takka of three new Mineralo Species propoisd hy Aem 
Prof. hepard. By J : 42. 
observations on some of the Habits of Salmo Fontinalis. By 
Sam . Bigztow, M.D., Worcester 49. 
By 
. Ayres, Boston 
On em Pi ese of the United States. 
E, M. D., New Yo 
Deséiption of a new Genus of Fishes, Sae 
W. 
Diis of Orocidihl misa By Sii ER E, Jt. i 
M. : EB 
D. Boston : 
Chemical Examination of Tiia a new Mineral Species ; ; 
by T*S. Huxr, of the Geological Commission of Canada; 
including a Descript ion of the Mineral, by F. — 
By Tonk Isla P 
. 64 
, ET 
ston 
peus of a Mineral dos Cherokee County, um 
By Francois ALGER, Boston 
On the Cu cline Structure ti some ve the Bones of the . 
Human Body. By JEFFRIES WYMAN, M D, Car, 
brid 
PR 
PLANTÆ kissed de Part I. Ad Aci a a : 
western 
"Collection of Plants made by F. Lindheimer in the 
1 - 
art of Texas, in the years 1845-6, and 1847-8, with Criti- Ai o 
cal Remarks, Dom of New = > Asa s ee 
Gray, M. D, 
