982 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 37. 
Cardita tumida Broderip= Venericardia crassicostata Sowerby. 
Cardita turgida Valenciennes, 1846=C. laticostata Sowerby. 
Cardita varia Broderip= Venericardia crassicostata Sowerby. 
Cardium aspersum Sowerby, cf. C. spinoswum Meuschen. 
Cardium laticostatum Sowerby =C. procerum Sowerby. 
Cardium panamense Sowerby=C. procerum Sowerby. 
Cardium planicostatum Sowerby, 1833, not of Sedgwick and Murchison, 1829=C. 
magnificum Deshayes. 
Cardium rastrum Reeve= C. senticosum Sowerby. 
Cardium rotundatum Carpenter=C. procerum junior. 
Cardium subelongatum Valenciennes, 1846, not of Sowerby, 1840. 
Cassis lactea Kiener= Phalium abbreviatum Lamarck. 
Cerithidea fortiuscula Bayle=C. montagnei Orbigny. 
Cerithidea valida C. B. Adams=C. montagnei Orbigny. 
Cerithidea varicosa Sowerby, not Defrance=C. montagnei Orbigny. 
Cerithium galapaginis Adams=C. interruptum Menke. 
Cerithium humboldtii Valenciennes=C. pacificum Sowerby. 
Cerithium irroratum Gould=C. stercusmuscarum Valenciennes. 
Cerithium nebulosum Sowerby, not Philippi=C. maculosum. 
Chetopleura hahni Rochebrune=Chiton fremblyi Broderip. 
Chama thaca Molina, see Paphia thaca Dall. 
Chione antiqua King, cf. Chione alvarezii Orbigny. 
Chione biradiata Gray = Macrocallista squalida Sowerby.” 
Chione tumens Verrill= Anomalocardia subimbricata Sowerby. 
Chionella, see Paradione. 
Chiton aculeatus Sowerby, in Beechey’s Voyage, not of Linnzeus. 
Chiton bicostatus Orbigny=C. pulchellus Gray. 
Chiton coquimbensis Frembly =Enoplochiton niger Barnes. 
Chiton glaber Clessin, cf. Tonicia elegans Frembly. 
Chiton magnificus Deshayes=C. latus Sowerby. 
Chiton olivaceus Frembly=C. latus Sowerby. 
Chiton patulus Sowerby=C. stokesti Broderip. 
Chiton scabriculus Sowerby = Chetopleura lurida Sowerby. 
Chiton spiniferus Frembly=C. echinatus Barnes. 
Chiton striatus Barnes, 1823, not of Lamarck, 1819, nor of Fischer, 1809. 
Chiton tuberculiferus Sowerby =C. echinatus Barnes. 
Chlorostoma, ci. Tegula. 
Chlorostoma tropidophorum Adams= Tegula luctuosa Orbigny. 
Columbella argus Orbigny = Nitidella ocellata Gmelin. 
Columbella castanea Gould=C. unicolor Sowerby. 
Columbella costata Duclos=Anachis fluctuata Sowerby. 
Columbella ebenum Gould, cf. C. unifasciata Sowerby. 
Columbella fusiformis Hinds=Strombina lanceolata. 
Columbella gibbosula Broderip=Strombina gibberula Sowerby. 
Columbella meleagris Duclos=C. fuscata Sowerby. 
Columbella nodalina Duclos=C. fuscata Sowerby. 
Columbella paytalida Duclos=C. paytensis Lesson. 
Columbella recurva Sowerby, ci. Strombina lanceolata. 
Columbella sordida Orbigny=C. unicolor Sowerby. 
Columbella spurca Sowerby, 1832=C. paytensis Lesson. 
Columbella suturalis Gray =Anachis fluctuata Sowerby. 
Columbella tessellata C. B. Adams, not of Gaskoin=C. guatemalensis Reeve. 
Columbella triomphalia Duclos=Cantharus distortus. 
Columbella unizonalis Gray=C. unifaseiata Sowerby. 
