436 bulletin: museum of comparative zoology. 



Siphonium centiquadra Valenciennes. 



Turritella goniostoma banksii Reeve. 



Cerithiuni uncinatum Gmelin. Taboguilla Id. 



Cerithium stercus-muscarum Valenciennes. Taboguilla Id. 



Ceritliium maculosum Kiener. Taboguilla Id. 



Cerithiopsis neglecta C. B. Adams. Perico Id. 



Triforis panamensis Bartsch. 



Planaxis planaxis Wood. Taboguilla Id. 



Ris.soiiia fortis C. B. Adams. Perico Id. Taboguilla Id. 



Crepidula onyx Sowerby. 



Cypraea exanthema Linne. 



Cypraea punctulata Gray. 



Cypraea arabicula Lamarck. 



Cypraea (Pustularia) pustula Swainson. 



Acmaea fascioularis Menke. Perico Id. Taboguilla Id. 



Nerita scabricosta Lamarck. 



Nerita bernhardi Recluz. Perico Id. Taboguilla Id. 



Chlorostoma inerme Gmelin. 



Omphalius reticulatus Gray. 



Fissurella mexicana Sowerby. Taboguilla Id. 



Fissurella nigropunctata Sowerby. Taboguilla Id. , 



Chiton stokesii Broderip. Taboguilla Id. 



Ischnochiton pectinulatus Carpenter. Taboguilla Id. 



Ischnochiton ophioderma Dall. Perico Id. 



Callistochiton periconis Dall. Perico Id. 



Mytilus multiformis Carpenter. Taboguilla Id. 



Myoforceps attenuatus Deshayes. Perico Id. 



Melina clicmnitziana Orbigny. Taboguilla Id. Perico Id. 



Margaritiphora fimbriata Dunker. Taboguilla Id. 



Lima angustata Reeve. Perico Id. 



Anomia lainpe Gray. 



Area mutabilis Sowerby. Taboguilla Id. 



Area illota Sowerby. Taboguilla Id. 



Area alternata Sowerby. Taboguilla Id. 



Carditamera affinis Broderip. Perico Id. 



Chama buddiana C. B. Adams. Taboguilla Id. 



Protothaca grata Say. Taboguilla Id. 



Kellia suborbicularis Montagu. Taboguilla Id. 



SuoRE Shells from Cocoa Island. 



Melampus panamensis C. B. Adams. 



Siplioiiaria gigas Sowerby. 



Mitra lens Wooil. 



Lntirus tuberculatus Broderip. 



Manx liuinilis Broderip. 



Thais mi'lones Duclog, 



Thais pntula liinnd. 



