240 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Genus, C.ECUM, Flem. 



102. C. NITIDUM, Stm. 



103. C. Floridanum, Stm. 

 West Coast. 



Genus, SCALARIA, Lam. 



104. S. LiNEATA, Say. 



105. S. MULTiSTRiATA, Say. 



106. S. ANGULATA, Say. 

 From both coasts. 



Family, Littorinid^e. 

 Genus, LITTORINA, Fer. 



107. L. IRRORATA, Say. 



108. L. ANGULIFERA, Lam. 



109. L. NODULOSA, i>es/i. 



110. L. DiLATATA, Z). Or?: 



111. L. 3IURICATA, Xam. 



All abundant except No. 109, of which I found a few specimens at 

 Bahiahonda Key. 



Sub-Genus, MODULUS, Gray. 



112. M. Floridanus, Con. Am. Jour. Conch., Vol. 5, p. 107. This 

 species resembles Modulus lenticularis, Ch., from which it is doubtfully 

 distinct. 



Genus, PHORUS, Montfort. 



113. P. CORRUGATUS, Eeeve. Bahiahonda Key. 



Genus, LITIOPA, Bang. 



114. L. STRIATA, Bang. Taken by Dr. Brown and myself from the 

 Gulf weed {Sargassum bacciferum) near Key West. 



Genus, RISSOA, Fremenville. 



115. R. INC03IPTA, Gould. Loc, east coast. 



Family, Neritid^. 

 Genus, NERITA, L. 



116. N. peloronta. Lam. 



117. N. VERSICOLOR, Lavi. 



118. N. TESSELLATA, Gmelin. 

 All abundant on the Keys. 



Family, Turbinid^. 

 Genus, TURBO, L. 



119. T. CRENULATUS, Gmelin. Loc, Tortugas. 



120. T. CASTANEUS, Lam. Cedar Keys southwards. 



