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Biol Bull 140: 84-94. (February 1971)
© 1971 Marine Biological Laboratory
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BIOLOGY AND LIFE HISTORY OF THE NUDIBRANCH MOLLUSC, CORYPHELLA STIMPSONI (VERRILL 1879)

M. PATRICIA MORSE 1

1 Marine Science Institute, Northeastern University, Nahant, Massachusetts 01908

1. The morphology and life history of the nudibranch mollusc, Coryphella stimpsoni (Verrill 1879) is described.

2. Adults were collected in October and deposited egg strings in December.

3. Development corresponds to Thompson's (1967) Type 3, i.e., juveniles crawl directly from the egg mass and begin benthic life.

4. Development time from egg deposition to the benthic crawling stage was from 25 to 52 days.

5. Veligers are characterized by a large amount of yolk, a reduced velum, a thin shell and no operculum.

6. Sequential development of tentacles, rhinophores and cerata and the differentiation of other organs such as cnidosacs, heart and digestive structures in the juveniles are described.

7. This is the first report of an eolid nudibranch from New England which crawls directly from the egg mass as a juvenile to begin benthic life.






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Copyright © 1971 by the Marine Biological Laboratory.