New information on Late Cretaceous, Paleocene, and Eocene neritid gastropods from the North American Pacific slope RICHARD L. SQUIRES AND LOUELLA R. SAUL, p. 177 Review of the genus Actinocyclus Ehrenberg, 1831 (Opisthobranchia: Doridoidea) ÁNGEL VALDÉS, p. 193 Owengriffithsius, a new genus of cyclophorid land snails endemic to northern Madagascar KENNETH C. EMBERTON, p. 203 Geographic variation of shell geometry in the abyssal snail Xyloskenea naticiformis (Jeffreys, 1883) MICHAEL A. REX, ANNELL BOND, RON J. ETTER, ANDREA C. REX, AND CAROL T. STUART, p. 218 Intermating interval and number of sperm delivered in the simultaneously hermaphroditic land snail Arianta arbustorum (Pulmonata: Helicidae) CLAUDIA HANGGI, ROLF LOCHER, AND BRUNO BAUR, p. 224 On the adaptive function of the love dart of Helix aspersa MICHAEL A. LANDOLFA, p. 231 Identical carbonic anhydrase contributes to nacreous or prismatic layer formation in Pinctada fucata (Mollusca: Bivalvia) T. MIYASHITA, R. TAKAGI, H. MIYAMOTO, AND A. MATSUSHIRO, p. 250 Thin layer chromatographic analysis of lutein and ß-carotene in Biomphalaria glabrata maintained on a high fat diet YONGHYUN KIM, BERNARD FRIED, AND JOSEPH SHERMA, p. 256 NOTES, INFORMATION & NEWS Kalidos griffithshauchleri, sp. nov., Madagascar's largest helicarionid snail (Pulmonata) KENNETH C. EMBERTON, p. 259 Fungi and other items consumed by the blue-gray taildropper slug (Prophysaon coeruleum) and the papillose taildropper slug (Prophysaon dubium) REX MCGRAW, NANCY DUNCAN, AND EFREN CAZARES, p. 261 The taxonomic status of the freshwater snail Antillobia margalefi Altaba, 1993, from Hispaniola (Hydrobiidae: Cochliopinae) FRED G. THOMPSON, p. 264 Predation of water bug Sphaerodema rusticum on the freshwater snails Lymnaea (Radix) luteola and Physa acuta G. ADITYA AND S. K. RAUT, p. 267 Two genera of North American freshwater snails: Marstonia Baker, 1926, resurrected to generic status, and Floridobia, new genus (Prosobranchia: Hydrobiidae: Nymphophilinae) FRED G. THOMPSON AND ROBERT HERSHLER, p. 269
