Tubercles of the upper surface numerous, especially in the ambulacra, round and prominent.
| Greatest diameter | 1.16 | inches. |
| Smallest diameter | 1.10 | ” |
| Height | 0.28 | ” |
Locality: The C. Gabbii occurs abundantly on the eastern shore of San Pablo Bay, south of Mare Island, in soft sand-stones of miocene age.
Collections of the State Geological Survey, and Academy of Natural Sciences; also Mr. Gabb’s, Mr. F. L. A. Pioche’s, and mine.
Dr. Kellogg read the following paper:
Description of a New Species of Allium.
BY A. KELLOGG, M.D.