Rissooidean snails from the Pit River Basin, California
ROBERT HERSHLER, TERRENCE J. FREST, HSIU-PING Liu, AND EDWARD J. JOHANNES, p. 275 Seasonal abundances of euthecosomatous pteropods and heteropods from waters overlying San Pedro Basin, California
FRANCES-A. CUMMINGS AND ROGER R. SEAPY, p. 305
Comparative karyology of lentic and lotic populations of Diplodon chilensis chilensis (Bivalvia: Hyriidae)
SANTIAGO PEREDO, PEDRO JARA-SEGUEL, ESPERANZA PARADA, AND CLAUDIO PALMA-ROJAS, p. 314
Larval and early juvenile development of the wavy turban snail, Megastraea undosa (Wood, 1828) (Gastropoda: Turbinidae)
SERGIO A. GUZMAN DEL PROO, TEODORO REYNOSO-GRANADOS, PABLO MONSALVO-SPENCER, AND ELISA SERVIERE-ZARAGOZA, p. 320 Thin layer chromatographic analysis of neutral lipids and phospholipids in Helisoma trivolvis (Colorado strain) maintained on a high fat diet
JESSICA L. SCHNECK, BERNARD FRIED, AND JOSEPH SHERMA, p. 325
Two aberrant new helicarionid land snail species from northern Madagascar
KENNETH C. EMBERTON, p. 329
Acanthina Fischer von Waldheim, 1807 (Gastropoda: Muricidae), an ocenebrine genus endemic to South America
THOMAS J. DEVRIES, p. 332 A new late Miocene Zonaria (Gastropoda: Cypraeidae) from central Chile
LINDSEY T. GROVES AND SVEN N. NIELSEN, p. 351
Energetics of swimming and crawling in the lion nudibranch, Melibe leonina
SANDRA L. CALDWELL AND DEBORAH A. DONOVAN, p. 355 NOTES, INFORMATION & NEWS Arion hortensis Férussac, 1819, species complex in Delaware and Pennsylvania, eastern USA (Gastropoda: Arionidae)
TIMOTHY A. PEARCE AND ELIZABETH G. BAYNE, p. 362
BOOKS, PERIODICALS & PAMPHLETS, p. 364
