238 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Philadelphia Academy of Sciences, as above, though the specimens are 

 so different from the typical shells that many persons, he remarks, would 

 consider it a new species. Found by Dr. J. W. Velie on the west coast, 

 and also among the Keys ; also by myself. 



Family, VolutiDyE. 

 Genus. VOLUTA, L. 



73. y. JuNONiA, Chem. This species has been called the rarest of 

 American shells, and high prices have been paid for it. Col. Jewett 

 dredged specimens off Tampa, and Count Pourtales in the Gidf stream. 

 Very good specimens are occasionally found on the Gulf coast that have 

 been washed ashore. It is an inhabitant of deep waters. 



Genus, MITRA, Lam. 



74. M. GRANULOSA, Lam. Loc, the Keys. 



Genus, MARGINELLA, Lam. 



75. M. APiciNA, Menlce. Large variety. 



76. M. APICINA, Menke. Small variety. 



77. M. CARNEA, Storer. 

 ''iS. M. GUTTATA, Billn. 



79. M. ROSCiDA, Bedf. 



Loc, from the Keys and west coast. All well marked species. 



Family, Cypr^id.e. 

 Genus, CYPR^A, L. 



80. C. EXANTHEMA, L. Syn., C. cervinetta, L. Quite common at 

 Tortugas and around the southern end of Florida. 



Sub-Genus, TRIVIA, Gray. 



81. T. QUADRiPUNCTATA, Gray. Common at Key West. 



82. T. PEDicuLUS, Bumph. Same locality. 



Genus, VOLVA, B(Men. 



83. y. UNiPLiCATA, Sowerby. Found at Tortugas. 



Genus, OVULUM, Lam. 

 8-i. O. GIBB0SU3I, Lam. Abundant at Tortugas. The preceding 

 species envelope their shells with the mantle from which the beautiful 

 enamel is derived that gives them so fine a polish. 



Family, Naticid^. 

 Genus, NATICA, Lam. 



85. X. DUPLiCATA, Say. 



86. N. CANRENA, L. 



The first species is abundant. The latter rare. 



