| Publication Type: | Journal Article |
| Year of Publication: | 1869 |
| Authors: | A. E. Verrill |
| Journal: | The American Naturalist |
| Volume: | 3 |
| Pagination: | 239-250 |
| URL: | http://www.jstor.org/stable/2447632 |
| Publication Type: | Journal Article |
| Year of Publication: | 1869 |
| Authors: | A. E. Verrill |
| Journal: | The American Naturalist |
| Volume: | 3 |
| Pagination: | 239-250 |
| URL: | http://www.jstor.org/stable/2447632 |