202 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
Phorcus, see Promartynia. 
Pinna, see Atrina. 
Pristiphora, see Serridens. 
Purpura Lamarck not M^rtyn, see Nucella. 
Purpura crispata, see Nucella lamellosa. 
Purpura decemcostata, see Nucella canaliculata. 
Purpura lactuca, see Nucella lamellosa. 
Purpura saxicola, see Nucella emarginata. 
Pterorytis, see Purpura. 
Retusa Brown, type Bulla ohtusa Montagu. 
Rissoa cooperi Tryon, see Barleeia subtenuis. 
Rissoa interfossa, see Bittium. 
Rupellaria, see Venerupis. 
Scala and Scalaria, see Epitonium. 
Scalaria hindsii, see Epitonium fallaciosum. 
Scrobs, see Amphithalamus. 
Bigaretus, see Binum. 
Biphonalia fuscotincta Carpenter,— Amphissa sp. jun.? 
Bkenea, see Siccneopsis. 
Btyliferina, see Alabina. 
Btylopsis, see Oraphis. 
Bubemarginula, see Hemitoma. 
Bulcularia, new section, type, Retusa sulcata Orbigny' (as Bulla). 
Burculina, see Phenacoptygma. 
Tapes, see Protothaca. 
Tegula coronulata, see mariana. 
Tegula fuscescens, see ligulata. 
Terebra simplex Carpenter 1865, not Conrad, 1830, see T. pedroana. 
Tornatina, see Acteocina. 
Tornatina cerealis= Acteocina culcitella junior. 
Trachydermon, see Lepidochitona. 
Trachydermon pseudodentiens, see L. dentiens. 
Trichotropis borealis not of Broderip and Sowerby, see T. coslcllata Coutboiiy. 
Trochiscus, see Norrisia. 
Trophon muricata Hinds, see Coralliophila hindsii Carpenter. 
Trophon muriciformis, see Neptunea dalli. 
Turritella polaris, see T. erosus. 
Vermetus, see Vermicularia. 
Vermetus fewkesii Yates, see V. eburnea junior. 
Volutella, see Merovia. 
Volvarina, see Hyalina. 
Volvarina varia, see Hyalina californica. 
VolvuTa, see Volvulella. 
