Guide to the systematic distribution of Mollusca in the British museum. Part I.
British Museum (Natural History). Department of Zoology.
Gray, John Edward, 1800-1875
London,Printed by order of the trustees,1857.
Includes four orders of Gasteropoda. "The concluding part [order V, Pneumobranchiata] is in hand, and it is hoped will shortly appear." cf. Pref.
No more published. cf. Brit. mus. (Nat. hist.) Cat.
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