202 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 



Phorcus, see Promartynia. 



Pinna, see Atrina. 



Pristiphora, see Serridens. 



Purpura Lamarck not Martyn, see Nua lla. 



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 obtusa Montagu. 



Rissoa cooperi Tryon, see Barlceia subtenuis. 



Rissoa interfossa, see Bittium. 



Rupellaria, see Venerupis. 



Scala and Scalaria, see Epitonium. 



Scalaria hindsii, see Epitonium fallaciosum. 



iscrobs, see Amphithalamus. 



Sigaretus, see Sinum. 



Siphonalia fuscotincta Carpenter,= Amphissa sp. jun.? 



Skcnea, see Skcneopsis. 



Styliferina, see Alabina. 



Stylopsis, see Graphis. 



Subeniarginula, see Hemitonia. 



Sulcularia, new section, type, Retusa sulcata Orbigny (as Bulla). 



Surculina, see Phenacoptygma. 



Tapes, see Protothaca. 



Tegula coronulata, see mariana. 



Tegula fuscescens, see ligulata. 



Tcrebra simplex Carpenter 1865, not Conx-ad, 1830, see T. pedroana. 



Tomatina, see Acteocina. 



Tornatina cerealis= Acteocina culcitella junior. 



Trachydermon, see Lepidochitona. 



Trachydermon pseudodentiens, see L. dentiens. 



Trichotropis borealis not of Broderip and Sowerby, see T. cost cl lata Couthouj 



Trochiscus, see Norrisia. 



Trophon muricata Hinds, see Coralliophila hindsii Carpenter. 



Trophon muriciformis, see Neptunea dalli. 



Turritella polaris, see T. erosus. 



Vermetus, see Vermicularia. 



Yermetus fewkesii Yates, see V. eburnea junior. 



Volutella, see Merovia. 



Volvarina, see Hyalina. 



Volvarina varia, see Hyalina californica. 



Volvula, see Volvulella. 



