REPORT ON THE PTEROPODA. 
43 
found in the most recent Tertiary deposits, and have received other titles in that 
connection. 
Creseis acicula, Ransr. 
Creseis cicus, Eschscholtz. 
Cleodorci anclrese, Boas. 
Hycdsea australis , d’Orbigny. 
Cleodora balantium, Rang. 
Balantium bicarinatum, Benson. 
Cleodora brownii , de Blainville. 
Creseis caligula, Eschscholtz. 
Clio caudata, Linne. 
Cleodora chaptalii, Souleyet. 
Cleodora chierchise , Boas. 
Creseis clava, Rang. 
Creseis compressa, Eschscholtz. 
Cleodora compressa, Souleyet. 
Creseis conica, Eschscholtz. 
Creseis conoidea, A. Costa. 
Hyalsea corniformis, d’Orbigny. 
Creseis cornucopise, Eschscholtz. 
Cleodora curvata, Souleyet. 
Hyalsea cuspidata, Bose. 
Clio depressa, Gray. 
Cleodora exaeuta, Gould. 
Cleodora falcata, Gould. 
Cleodora falcata, Pfeffer. 
Cleodora jlexa, Pfeffer. 
Cleodora injlata, Souleyet. 
Cleodora lamartinieri, Rang. 
Hyalsea lanceolata, Lesueur. 
Creseis zonata, 
Cleodora lessonii, Rang. 
Cleodora lobata, Sowerby. 
Cleodora martensii, Pfeffer. 
Creseis monotis, Troschel. 
Cleodora munda, Gould. 
Cleodora obtusa, Quoy and Gaimard. 
Cleodora occidentalis, Dali. 
Clio pellucidum, Gray, 
Creseis phseostoma, Troschel. 
Cleodora placida, Gould. 
Balantium politum, Craven, MS. 
Cleodora pygmsea. Boas. 
Clio pyramidata, Linne. 
Cleodora quadrispinosa, Rang. 
Styliola recta, Lesueur. 
Balantium recurvum, Benson. 
Clio rugosum, Gray. 
Creseis rugulosd, Cantraine. 
Creseis spinifera, Rang. 
Creseis striata. Rang. 
Creseis striata, Delle Chiaje. 
Cleodora subula, Quoy and Gaimard. 
Cleodora sulcata, Pfeffer. 
Hyalsea tricuspidata, Bowdich. 
Cleodora trifilis, Troschel. 
Creseis unguis, Eschscholtz. 
Creseis virgula, Rang. 
Styliola vitrea, Yerrill. 
,, Delle Chiaje. 
These fifty-seven names may be classified as follows : — 
1. One may be discarded as not referring to a Pteropod, viz., Creseis rugulosa, 
Cantraine, 1 which is really a Gastropod of the genus Csecum. 
2. One refers to the adult stage of another genus of Thecosomatous Pteropods, 
viz., Cleodora obtusa, Quoy and Gaimard, which is probably the same as Cuvierina 
columnella. 
1 Malacologie Mediterraneenne et littorale, Mem. Acad. d. Sci. Bruxelles, t. xiii. p. 32. 
