PROFESSORS B. SILLIMAN, B. SILLIMAN, JR., AND JAMES D. DANA, IN CONNECTION WITH PROF. ASA GRAY, OF CAMBRIDGE, SECOND SERIES. VOL. XXX. -NOVEMBER, 1860. WITH AN INDEX TO VOLS. XXI—XXX, AND FIVE PLATES. NEW HAVEN: EDITORS. 1860. PRINTED BY E. HAYES, 426 chapel st. |