Transcriber’s Note:
The cover image was created by the transcriber and is placed in the public domain.
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THE
NAUTILUS
A QUARTERLY
DEVOTED TO THE INTERESTS
OF CONCHOLOGISTS
| EDITORS AND PUBLISHERS: | ||
| H. A. Pilsbry, Special Curator of the Department of Mollusca, Academy of Natural Sciences, Philadelphia. | ||
| C. W. Johnson, Curator of the Boston Society of Natural History. | ||
| Vol. XXXI. | OCTOBER, 1917. | No. 2 |
CONTENTS:
| Notes on the variation of Ischnochiton conspicuus. By E. P. Chace | [37] |
| Lampsilis ventricosa cohongoronta in the Potomac River. By Wm. A. Marshall | [40] |
| Collecting about Guantanamo Bay, Cuba. By John B. Henderson | [41] |
| Amnicolidæ from Oneida Lake, N. Y. By H. A. Pilsbry | [44] |
| New Genera and Species of Central American Naiades. By L. S. Frierson | [47] |
| On the rate of growth of pond Unios. By L. S. Frierson | [49] |
| A new South African Nesopupa. By H. A. Pilsbry | [50] |
| A new Gundlachia from Guatemala. By Bryant Walker | [51] |
| A list of shells from the East Coast of Florida. By Bryant Walker | [53] |
| Collecting in Digby, Nova Scotia. By Lilian Dyer Thompson | [57] |
| A new type of the naiad-genus Fusconaia. By A. E. Ortmann | [58] |
| The Relation of snail fauna to floods. By A. Richards | [64] |
| William Bullock Clark | [68] |
| Publications received | [69] |
| Notes | [71] |
C. W. JOHNSON, Business Manager,
Boston Society of Natural History,
Berkeley Street,