New Late Cretaceous Mytilid and Tellinoidean Bivalves from California RICHARD L. SQUIRES AND LouELLA R. SAUL, p. 121 A New Genus of Indo-West Pacific Turridae (Gastropoda: Prosobranchia) ANTONIO BONFITTO AND MAURO MORASSI, p. 136 Growth and Activity Patterns in a Backyard Population of the Banana Slug, Ariolimax columbianus ANITA K. PEARSON, OLIVER P. PEARSON, AND PETER L. RALPH, p. 143 Lower Eocene Gastropods from the El Bosque Formation, Central Chiapas, Mexico MARIA DEL CARMEN PERRILLIAT, JAVIER AVENDAÑO, FRANCISCO J. VEGA, AND JESÚS SOLÉ, p. 151 Redescription of Two Antarctic Species of Cuspidaria: C. concentrica Thiele, 1912 and C. minima (Egorova, 1993) (Bivalvia: Cuspidariidae) DIEGO G. ZELAYA AND CRISTIAN ITUARTE, p. 170 Shedding Light onto the Genera (Mollusca: Nudibranchia) Kaloplocamus and Plocamopherus with Description of New Species Belonging to These Unique Bioluminescent Dorids YVONNE VALLÈS AND TERRENCE M. GOSLINER, p. 178 A New Species of Lipidochitona (Mollusca: Polyplacophora) from El Salvador CEDAR I. GARCÍA-RÍOS, p. 206 On the Occurrence of Rhomboidella prideaux (Leach, 1815) (Mollusca: Bivalvia: Mytilidae) in the Eastern Mediterranean BILAL ÖZTÜRK, JEAN-MAURICE POUTIERS, MESUT ÖNEN, AND ALPER DOGAN, p. 215 Seasonality, Habitat Preference and Life History of some Willamette Velley Wet Prairie Terrestrial Molluscs in Western Oregon, USA PAUL M. SEVERNS, p. 220 Exallocorbula (Bivalvia: Corbulidae), a New Name for the Amazonian Molluscan Fossil Pebasia Nutall ANDRÉ NEMÉSIO, AUDREY ARONOWSKY, AND LAURIE C. ANDERSON, p. 228 Cryptodapbne kilburni, a New Species of Bathyal Turrid (Gastropoda: Prosobranchia) from the Gulf of Aden (Northwestern Indian Ocean) MAURO MORASSI AND ANTONIO BONFITTO, p. 230