Abstract
THE present is the twenty-fourth Memoir, published after a considerable interval, of the well-known L.M.B.C. series. The animal with which it deals is a member of the Opisthobranchiata, one of the two orders of Euthyneura, to the other of which, the Pulmonata, belong the ordinary land snails. Though one of these latter animals is very usually studied in the laboratory as an example of Gastropoda, Aplysia presents several advantages as a type for dissection. It is the largest British Gastropod. It exemplifies a number of morphological tendencies, and exhibits intermediate characters between the primitive and more specialised forms. Its internal organs “afford numerous links in the chain of evidence that detorsion has taken place.” The palliovis-ceral nerve cords are long (as in Streptoneura), but uncrossed (as in Euthyneura in general); the nervous system is less markedly concentrated than in many other Euthyneura, and the animal exemplifies the tendency to disappearance of the shell and mantle-cavity.
Liverpool Marine Biology Committee: L.M.B.C. Memoirs on Typical British Marine Plants and Animals.
Edited by Prof. W. A. Herdman Prof. J. Johnstone. No. 24, Aplysia, By Nellie B. Eales. Pp. viii + 84 + 7 plates. (Liverpool: University Press, 1921.) 4s. 6d.
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Liverpool Marine Biology Committee: LMBC Memoirs on Typical British Marine Plants and Animals . Nature 108, 398 (1921). https://doi.org/10.1038/108398b0
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DOI: https://doi.org/10.1038/108398b0