Description of the egg mass of the pygmy cuttlefish, Idiosepius pdradoxus (Cephalopoda: Idiosepiidae), with special reference to its multiple gelatinous layers TAKASHI KASUGAI AND YUZURU IKEDA, p. 105 First observations on the larval development of the marine purple snail Plicopurpura pansa (Gould, 1853) under laboratory conditions LUDWIG C. A. NAEGEL, SONIA RODRÍGUEZ-ASTUDILLO, DORA HERNANDEZ-CEBALLOS, AND CARLOS CACERES-MARTÍNEZ, p. 111 A review of the Recent and Late Cenozoic Calyptraeidae of New Zealand (Mollusca: Gastropoda) BRUCE A. MARSHALL, p. 117 Additions to Late Cretaceous shallow-marine gastropods from California RICHARD L. SQUIRES AND LOUELLA R. SAUL, p. 145 Distribution of sister Littorina species, I: tenacity and the wave-exposure gradient PAUL A. HOHENLOHE, p. 162 Some aspects of the life history of an intertidal population of the nudibranch Dendronotus frondosus (Ascanius, 1774) (Opisthobranchia: Dendronotoidea) in the Bay of Fundy RONALD B. AIKEN, p. 169 NOTES, INFORMATION & NEWS Synonymy of Cadlina burnayi Ortea, 1988, from the Cape Verde Islands (Opisthobranchia: Chromodorididae) with Tyrinna evelinae (Marcus, 1958) ÁNGEL VALDÉS AND CARLOS MANUEL LOURENÇO AFONSO, p. 176 A new species of Cuthona Alder & Hancock, 1855, from the Gulf of California, Mexico (Opisthobranchia: Nudibranchia: Tergipedidae) ORSO ANGULO CAMPILLO AND ÁNGEL VALDÉS, p. 179 Effects of larval Echinostoma caproni and Schistosoma mansoni infection on the heart rate of Biomphalaria glabrata snails BERNARD FRIED AND YONGHYUN KIM, p. 182 Cochlicopa Férussac, 1821, not Cionella Jeffreys, 1829; Cionellidae Clessin, 1879, not Cochlicopidae Pilsbry, 1900 (Gastropoda: Pulmonata: Stylommatophora) BARRY ROTH, p. 183 BOOKS, PERIODICALS & PAMPHLETS, p. 186
