The American Journal of Science and Arts

S C II. N C E A N D A R. T. S.

CONDUCTED BY

PROFESSORS B. SILLIMAN, B. SILLIMAN, JR,

JAMES D. DANA,

IN CONNECTION WITH

PROF. ASA GRAY, OF CAMBRIDGE,
PROF. LOUIS AGASSIZ, OF CAMBRIDGE,
DR. WOLCOTT GIBBS, OF NEW YORK.

S E C 0 N ID S E R I E S.

VOL. XXX. —NOVEMBER, 1860.
WITH AN INDEX TO WOLS. XXI-XXX,

AND FIVE PLATES.

N E W H A V E N : E D I TO R. S.
1 86 0.

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PRINTED BY E. HAYEs, 426 CHAPEL ST.

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