152 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Nanina by Nevill. It precedes Thysanota. Godwin- Austen also 

 placed the genus Syhesia ^ {Ruthvenia ^) — proposed by me in 1897',^ 

 under the preoccupied name of Austenia, as a section of Plectopylis — 

 in the subfamily Thysanotinse. 



An addition to the family of Entodontidee was made by Pilsbry by 

 the creation of the genus Racliodiscus,^ containing five species of 

 Pyramidula-Wke snails from Patagonia, previously ranged under 

 Stephanoda, Alb. 



The genus Sphyradium, Charp., originally proposed as a sub- 

 genus of Pupa, was referred to Entodontidse near Punctum by 

 Sterki,^ but Pilsbry transferred it back to Pupillidae.^ 



Pterodiscus, Pils., a section of Entodonta comprising four small 

 Pacific Island shells, was removed by Pilsbry to Achatinellidae.'' 



In an exhaustive anatomical paper Mr. H. Watson proves^ that 

 Pyramidula rupestris, Drap., belongs to the Pupillidse. It does not, 

 however, follow that all the numerous species that have been 

 comprised under Pyramidula should share the same fate. In the 

 same paper Mr. Watson refers Pyramidula halmei, P. & M., also to 

 Pupillidae. With this species for type, a new subgenus — Pleuro- 

 discus — was proposed in 1919 by Herr W. Wenz.^ 



Pupisoma, Stol., doubtfully placed as a subgenus of Pyramidula 

 in his " Guide ", has also been transferred by Pilsbry to Pupillidse.^" 



Wollaston proposed a section Julus for his Helix garrachicoensis, 

 which was placed by Pilsbry as a section under Pyramidula. He drew 

 attention to the fact that Julus was preoccupied, but did not give 

 a new name. I substituted the name Kercea?^ 



Ashmunella was created by Cockerell & Pilsbry ^^ for some 

 North American Helices previously ranged in Polygyra. It now 

 numbers twenty species. 



Helix reyrei, Souv., was placed in the genus Polygyratia by Pilsbry, 

 bat Kobelt in 1905,^^ referred it to the family of Streptaxidae, genus 

 Systrophia, section Entodina, Anc. Von Ihering in 1912 ^^ removed 

 another member of the group, P.janeirensis, Pfr., to the same section, 

 and suggested that P. cheilostropha, Orb., and others might have to 



^ Science Gossip, N.S., iii, p. 332. 

 2 Proc. Malac. Soc, ix, 1911, p. 271. 

 ^ Science Gossip, N.S., torn, cit., p. 300. 



* Proc. Acad. Nat. Sci. Philad. , Iviii, 1906, p. 154. 



* Nautilus, X, 1896, p. 75. 

 « lb., xxvi, 1912, p. 60. 



■^ Proc. Acad. Nat. Sci. Philad., Ivii, 1905, p. 572; Man. Conch., ser. ii, 

 vol. xxi, 1911, pp. 118, 120 ; vol. xxiii, 1914, p. 16. 



* Proc. Malac. Soc, xiv, 1920, p. 6, et seqq. 

 9 Nachr. Bl. D. Malak. Ges., 1919, p. 78. 



^^ Man. Conch., ser. ii, vol. xxvi, 1921, p. 19. 



" Proc. Malac. Soc.,ix, 1911, p. 271. 



1^ Nautilus, xii, 1899, p. 107 ; Proc. Acad. Nat. Sci. Philad., 1899, p. 188. 



" Conch. Cab. Agnatha, ii, 1905, p. 86. 



1* Journ. Acad. Nat. Sci. Philad., ser. ii, vol. xv, 1912, p. 488. 



