522 THE NAUTILUS. 
Modiolus tulipus Linn, 
Arca occidentalis Phil. Several fine living specimens. 
Arca transversa Say. One fine specimen. 
Arca secticostata Rve. One single valve. 
Arca campechensis Dillw. Six fine specimens. 
Pectunculus pennaceus Gmel. Four single valves. 
Divaricella dentata Wood. One fine pair. 
Lucina tigrina Linn. Several fine specimens. 
Chama macrophylla Lam. One specimen and single valves. 
Cardium isocardia Linn. Several fine specimens. 
Cardium muricatum Linn. Single valves. 
Liocardiwm serratum Linn. One fine valve. 
Liocardium mortont Conr. Common. 
Venus mortoni Conr. One single valve. 
Chione cancellata Linn. Common. 
Chione intapurpurea Conr. One fine single valve. 
Anomalocardia cuneimeris Conr. Several. 
Pitaria simpsoni Dall. One single valve. 
Pitaria fluminata Menke. One fine specimen. 
Tagelus gibbus Spengler. One good specimen. 
Tellina magna Spengler. One large single valve. 
Tellina brasiliana Lam. Several fine specimens. 
Macoma cerina C. B. Adams. Common. 
Teredo navalis Linn. Common in timbers. 
Bulla occidentalis A. Adams. In Lake Worth common. 
Haminea guildingi Swainson. In Lake Worth common. 
Melampus lineatus Say. In Lake Worth common. 
Siphonaria naufragum Stearns. Lake Worth inlet few. 
Terebra dislocata Say. Common. 
Conus proteus Hwass. One partly broken specimen. 
Cancellaria reticulata Linn. Few. 
Oliva literata Lam. Several large specimens. 
Marginella apicina Menke. Common in Lake Worth. 
Fasciolaria gigantea Kiener. Two young shells. 
Fasciolaria distans Lam. Beach-worn shells. 
Fulgur pyrum Dillw. Three specimens. 
Fulgur canaliculata Say. Beach-worn shells. 
Fulgur perversa Linn, One large living shell 11 inches long. 
