ACMÆIDÆ ^Acmæa^ ^A. testudinalis^ ^A. testudinalis,^ Var. ^alveus^ ^A. mitra^ ^A. patina^ ^Lottia^ ^L. gigantea^ FISSURELLIDÆ ^Fissurella^ ^F. alternata^ ^F. barbadensis^ ^F. (Glyphis) aspersa^ ^Lucapina^ ^L. crenulata^ HALIOTIDÆ ^Haliotis^ ^H. splendens^ ^H. rufescens^ ^H. cracherodii^ TROCHIDÆ ^Margarita^ ^M. cinerea^ ^M. helicina^ ^M. undulata^ ^Calliostoma^ ^C. occidentale^ ^C. jujubinum^ ^C. annulatum^ ^C. canaliculatum^ ^C. costatum^ ^Chlorostoma^ ^C. funebrale^ ^C. brunneum^ ^Trochiscus^ ^T. norrisi^ ^Livona^ ^L. pica^ TURBINIDÆ ^Turbo^ ^T. castaneus^ Var. ^crenulatus^ NERITIDÆ ^Nerita^ ^N. peleronta^ ^N. tessellata^ ^N. versicolor^ ^Neritina^ ^N. reclivata^ ^N. viridis^ Suborder =MONOTOCARDIA= JANTHINIDÆ ^Janthina^ ^J. fragilis^ SCALIDÆ ^Scala^ ^S. lineata^ ^S. multistriata^ ^S. groenlandica^ ^S. angulata^ NATICIDÆ ^Polynices^ ^P. (Lunatia) heros^ ^P. (Lunatia) triseriata^ ^P. (Lunatia) lewisii^ ^P. (Neverita) duplicata^ ^P. (Neverita) recluziana^ ^Natica^ ^N. clausa^ ^N. canrena^ ^Sigaretus^ ^S. perspectivus^ CAPULIDÆ ^Crepidula^ ^C. fornicata^ ^C. plana^ ^C. aculeata^ ^Crucibulum^ ^C. striatum^ ^C. spinosum^