Publisher's Synopsis
Excerpt from Manual of Conchology, Vol. 16: Structural and Systematic; With Illustrations of the Species; Philinid�, Gastropterid�, Aglajid�, Aplysiid�, Oxynoeid�, Runcinid�, Umbraculid�, Pleurobranchid�
II. Head without shield, bearing a pair of enrolled, erect rhino phores, with usually an anterior pair of labial tentacular pro cesses; gill dorsal male and female orifices widely separated.
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