ABSTRACT
This paper is a record of observations on insemination in five species of marine forms, Arbacia punctulata (sea urchin), Woods Hole, Mass., Paracentrotus (Strongy-locentrotus) lividus (sea urchin), Villefranche-sur-Mer, Echinachnius panna (sand-do liar), Mt Desert Island and Woods Hole, Cerebratutus lacteus (nemertine), Mt Desert Island and Woods Hole, and Nereis Embata (annelid), Woods Hole. The observations on all except the European species were made at different times during several summers.
Copyright © 1933 The Company of Biologists Ltd.
1933
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