24 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



U.S.N.M. No. 503983 contains 74 specimens collected by Henderson 

 and Simpson at Trou Caiman, Thomazeau. 



U.S.N.M. No. 354972 contains 19 specimens collected by Henderson 

 and Bartsch 4 miles north of Trou Caiman, Thomazeau. 



U.S.N.M. No. 503789 contains 51 specimens from Glore, Thomazeau. 



U.S.N.M. No. 503992 contains 6 specimens collected by Henderson 

 and Simpson on the shore of Lake Assua, Haiti. 



U.S.N.M. No. 379962 contains 87 specimens collected by Eyerdam at 

 Morne a Cabrits. 



U.S.N.M. No. 503991 contains 38 specimens collected by Henderson 

 and Simpson at Morne a Cabrits. 



U.S.N.M. No. 402843 contains 71 specimens collected by Orcutt at 

 Morne a Cabrits. 



U.S.N.M. No. 392862 contains 3 specimens collected by Bartsch at 

 Morne a Cabrits. 



This superb species was found abundantly on the mountain east of 

 Thomazeau both by Henderson and Simpson and by Henderson and 

 the author. 



It occupies higher ground than Chondropoma (Chondropomium) 

 szuiftii weinlandi from which its much greater size and thickened outer 

 and basal peristome readily distinguish it. 



CHONDROPOMA (CHONDROPOMIUM) 8WIFTII (Shattleworth) 



This species has enjoyed various vicissitudes. It was first brought to 

 the attention of mollusk students by Pfeiffer in 1854,'^ under the name 

 Cyclostoma (Chondropoma) semilabre Lamarck, which was a misiden- 

 tification. From this time until 1862 it was listed under that name by 

 various authors who followed Pfeififer in his erroneous concept. 



In 1854 Shuttleworth^ described it under the name Cyclostoma (Chon- 

 dropoma) swiftii. He stated that he had received it from Bland, who 

 said that a few specimens had been collected near Ponce, Puerto Rico, 

 by Swift. 



An enlarged photograph of Shuttleworth's type, which is in the 

 Naturhistorisches Museum at Bern, Switzerland, leaves not the slightest 

 doubt about this being the Hispaniolan species. In those days commerce 

 between Ponce and the Dominican Republic was even greater than 

 today, and the locality mix-up is easily accounted for. 



My own collecting and that of my students about Ponce and that of 

 every one else have failed to rediscover this on the south coast of 

 Puerto Rico. The species must therefore bear the name Chondropoma 

 swiftii in the future. This is to be regretted, since in 1862 Pfeiffer, yield- 

 ing to the criticism of fellow-workers, bestowed upon the shells collected 



'Martini-Chemnitz Conchylien Cabinet, ed. 2, vol. 1, sect. 19, p. 271, pi. 37, figs. 1, 2; pi. 49, 

 figs. 17-20. 



«Berner Mitth., 1854, pp. 91-92. 



