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1954. : Pulmonata) II. The genital organs of Biomphalaria boisyi (Subfamily Planorbinae, H.A. Pilsbry, 1934). In 8°, offp., pp. 12 con 3 tav. Offprint from Trans, Amer. Microsc. Soc., 73(3)
Morphological studies on the family Planorbidae (Moll
1954. : Pulmonata) I. Genital organs of Helisoma trivolvis (Subfamily Helisomatinae, F.C. Baker, 1945). In 8vo, original wrappers, pp. 22 + 4 pls. Offprint from Trans, Amer. Microsc. Soc., 73(2)