302 



On ALOPIA CYCLOSTOMA (Bielz), A. CANESCENS (Charp.) 

 and A, DEANIANA, n.sp. 



By the Rev. Dr. A. H. Cooke. 



(Read before the Society, December 7th 1921). 



Plate IX. 



L. Pfeiffer described, without figure, in P.Z.S., 1849, P- ^35) ^ "^w 

 species, Clausilia cyclostoma : " Habitat in Archipelago Koreano 

 (Sir Edw. Belcher)." He described at the same time other species 

 from the same place, similarly received, and said to come from the 

 Cumingian collection. 



In Malak. Blatt. 1855, p. 180 Pfeiffer lists his C/. cyclostoma under 

 Nenia, and in his Novitates i, Heft 8, 1856, p. 79-80, pi. 22, f. 15-18, 

 he says: — "This species, which has never before been figured, seems 

 so closely related to the preceding [A^. blandiana Pfr.] that it must 

 be concluded they have a common habitat. In the Cumingian 

 collection it was labelled as from the Corean Archipelago, but Mr. W. 

 Benson has also received it from S. America, and there is much to be 

 said for this view." 



Kiister, Conchylien Cabinet, vol. I. (1857-60), Clausilia p. 212, 

 repeats Pfeiffer's description, with habitat " S. America," and figures 

 the shell on pi. 23, f. 16-19. 



E. R. Sykes in Journ. Malac, v, 1896, p. 58 writes: — " C. cyclos- 

 toma was described by Pfeiffer from the Corean Archipelago ; 

 subsequently he stated that it was probably S. American, while in the 

 Nomenclator Hel. Viv. [ed. 1881 (Clessin), p. 407, no. 6^^,cylostoma 

 typ. error] it appears as from Venezuela, and a specimen in my 

 collection is said to have come from " Quito, Peru," which I assume 

 refers really to the Quito in Ecuador. The real habitat therefore 

 remains uncertain." 



Jousseaume, Bull. Soc. Philom. Paris (9) ii, p. 23, 1900, in a list of 

 South American Nenia, places JV. cyclostoma Pfr., with loc. Columbia 

 in his collection. 



Boettger, in Nachr. deutsch. Malak. Gesell. xli, 1909, p. 175, lists 

 Nenia cyclostotna Pfr. 1849' ^s from Venezuela, Ecuador and U.S. 

 Columbia. 



Pilsbry, Proc. Acad. Philad., Ix, 1918, pp. 452-55, does not include 

 CI. cyclostoma Pfr. in his list of the Clausilia of Korea. 



Pfeiffer's type specimens (three) are in the Mus. Brit, collection, 

 and belong unquestionably to Nenia : it seems strange that Sykes did 



