CONTENTS OF NO. I. VOL. VI. 
Art. I.—On the Embryology of Nemertes, with an Appendix on 
.the Embryonic Development of Polynde; and Remarks upon the 
Embryology of Marine Worms in general. By E. Desor, Boston. 
Art. 1I. — Descriptions and Figures of the Araneides of the United 
States. By Nicholas Marcellus Hentz, Tuscaloosa, Alabama. 
Arr. III. — Chemical Examination of some American Minerals. By 
J. D. Whitney, Boston. 
Art. IV. — Examination of three new Mineralogical Species pro- 
posed by Prof. C. U. Shepard. By J. D. Whitney. 
Art. V.— Observations on some of the Habits of Salmo Fontinalis. 
By Samuel L. Bigelow, M. D., Worcester. . 
Art. VI. — Description of a new Genus of Fishes, Malacosteus. By 
W. O. Ayres, Boston. 
Arr. VII. — On the Pselaphide of the United States. By John L. 
Le Conte, M. D., New York. 
Art. VIII. — Dissection of Crocodilus OES By Samuel Knee- 
land, Jr., M. D., Boston. . í b 
Arrt. IX. — Chemical Examination of Algerite, a new Mineral Spe- 
cies; by T. S. Hunt, of the Geological Commission of Canada: 
including a Description of the Mineral, by F. Alger, Boston. 
Arr. X. — Examination of a Mineral from Cherokee County, Geor- 
gia. By Francis Alger, Boston. RN Ep 
Art. XI. — On the Cancellated Structure of some of the Bones of 
the Human Body. By Jeffries Wyman, M. D., Cambridge. 
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