. Bulletins of American paleontology. 78 Bulletin 332 Sowerby, 1841a, and Chicoreits (Phyllonotus) pomum (Gmelin. 1791), pp. 25 and 40, respectively]. Because of the overall similarity of all of the mem- bers of Talityphis. the nomenclature of this species has been more than usually complicated by misidentifi- cations. It has been variously referred to Typhis (Tal- ityphis) alatus Sowerby, 1850 [see p. 76], T. obesus Gabb, 1873, and T. More recently, it was staled by Radwin and D'Attilio (1976, p. 201) that T. is a synonym of the subsequently named Ty- phis piiertoriceiisi
. Bulletins of American paleontology. 78 Bulletin 332 Sowerby, 1841a, and Chicoreits (Phyllonotus) pomum (Gmelin. 1791), pp. 25 and 40, respectively]. Because of the overall similarity of all of the mem- bers of Talityphis. the nomenclature of this species has been more than usually complicated by misidentifi- cations. It has been variously referred to Typhis (Tal- ityphis) alatus Sowerby, 1850 [see p. 76], T. obesus Gabb, 1873, and T. More recently, it was staled by Radwin and D'Attilio (1976, p. 201) that T. is a synonym of the subsequently named Ty- phis piiertoriceiisis Warmke, 1964, which would leave the Caribbean species usually cited as T. expansus without a name. Therefore, they proposed for it Typhis perchardei (Radwin and D'Attilio, 1976, p. 236), al- though nowhere do they note that the name T. per- chardei is for the T. of authors. If Typhis pueriuricensis were the T. of au- thors then a serious problem would arise, as T. pansus is the type species of the subgenus Talityphis Jousseaume and T. puertoricensis is better assigned to the subgenus Rugotyphis Vella, 1961. However, we are spared this complication as the holotype of Sowerby's species is in the collections of the National Museum of Wales at Cardiff. Photographs of the specimen (Text- fig. 21) kindly provided by Dr. P. Graham Oliver, show. Text-figure 2L —Apcrtural and abapcrtural views of Typhis {Tal- ityphis) expansus Sowerby. Hoiolype, National Museum of Wales. No. ^ 3. Height mm, diameter mm. (Photo courtesy of National Museum of Wales) that T. is the species so identified by most workers. Comparisons. — A\\ho\x^ Gertman (1969, pi. 4, fig. 3) considered the Bowden Formation examples of Tal- ityphis as being nearer to T. obesus than to the Recent species T. , much additional material dem- onstrates that the Bowden specimens are the same as those that occur in the correlative Moin Formation of Costa Rica,
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