OF 
SCIENCE AND ARTS. 
CONDUCTED BY 
PROFESSORS B. SILLIMAN, B. SILLIMAN, Iti, 2 
ep AND 
JAMES D. DANA, 
IN CONNECTION WITH 
PROF. ASA GRAY, or CAMBRIDGE, 
PROF. LOUIS AGASSIZ, or CAMBRIDGE, 
DR. WOLCOTT GIBBS, or NEW YORK. 
SECOND SERIES. = 
VOL. XX.—_NOVEMBER, 1855. 
WITH AN INDEX To vous, xxx, Aon 
- AND TWO PLATES. ve Peres 
a xp ar. trt se il ww } ae a Ft j nd « 
os Se pos 
NEW HAVEN: EDITORS. 
NEW YORK: G. P. PUTNAM & CoO. 
BE. HAYES, PRINTER: 
