156 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



with four other species. This genus now numbers some forty-nine 

 species, 



Micrarionta, Anc, considered as a subgenus of Epiphragmophora 

 in his " Guide ", was raised to generic rank ^ and divided into three 

 sections : typical Micrarionta, Eremarionta, and Xerarionta. The 

 genus included some species previously referred to Sonorella, and 

 now numbers twenty-six species. 



In 1896 Mr. H. Fulton proposed a new subgenus, Xenothauma ^ 

 for Helix haroni, Fulton. Kobelt ^ placed this species in the genus 

 Bostryx, while still considering it a Helix, at the same time referring 

 to its apparent affinity to Helix reentsi, a species described by 

 Philippi in 1855,* which shared a similar fate when it was trans- 

 ferred by Pilsbry ^ to Bostryx, who then reduced the latter to 

 subgeneric rank under Bulimulus, creating a new section — 

 Platyhostryx — for the reception of H. reentsi, and substituted the 

 specific designation eremothauma, on account of the previously 

 described Bulimus reentsi} 



Cathaica, originally proposed as a group of Helices by Mollendorff, 

 was adopted by Pilsbry as a section of Eulota, but Andreae in 1900 

 raised it to generic rank '' and split it into five subgenera, four of 

 these new {Eucathaica, Pliocathaica, Xerocathaica, Campylocathaica), 

 and Pseudiherus, Anc. In 1919 I introduced another subgenus, 

 Trichocathaica,^ taking C. lyonsce, a new species described at the same 

 time, as type. Semihuliminus, proposed as a section of Buliminopsis 

 by Mollendorff^ for B. heresowskii, and in which, subsequently, 

 he included ^° a shell described by Sturany as 1 Satsuma kutupaensis,^^ 

 I consider more probably as pertaining to Cathaica, and therefore 

 suggest its transference, as a seventh subgenus of the latter. 

 LcBocathaica was introduced by Mollendorff ^^ as a distinct genus of 

 sinistral forms of Cathaica with Helix christince, H. Ad., as type. 

 Fourteen species are now classed under it. 



Acusta, introduced as a section of Nanina by Von Martens ^^ for 

 three species, with Helix ravida as type, was treated as a synonym 

 for Eulota by Pilsbry, but Mollendorff ^^ revived it as a section of 



1 lb., 1913, p. 380. 



2 Ann. Mag. Nat. Hist., ser. vi, vol. xviii, p. 102. 

 » Conch. Cab. Heliceen, iv, 1897, p. 843. 



4 Ann. Univ. Chile, 1855, p. 213. 



^ Man. Conch., ser. ii, vol. x, 1896, p. 155. 



6 Zeits. Malak., viii, 1851, p. 30. 



■^ Mitth. Roemer Mus., No. 12, p. 2. 



^ Proc. Malac. Soc, xiii, p. 119. 



9 Ann. Mus. Zool. St. Petersb., iv, 1899, p. 133. 



10 lb., 1902, p. 307. 



11 Denkschr. Math. Naturw. CI. K. Akad. Wiss., 1900, p. 12. 

 " Ann. Mus. Zool. St. Petersb., iv, 1899, p. 86. 



" Die Heliceen, 1860, p. 56. 



1* Ann. Mus. Zool. St. Petersb., 1899, p. 73. 



