GUDE : CHANGES IN CLASSIFICATION OF HELICES. 157 



Eulota ; at the same time he proposed a new section Eulotella,^ 

 which now numbers some twenty-five species. 



Some further subgenera of Eulota remain to be dealt with. 

 Neseulota, proposed by Ehrmann ^ with three species, the type being 

 E. hemisphcenca, Mlldff. ; Landouria ^ with five species, having 

 H. huttoni, Pfr., for type ; and Mikiria ^ by Godwin- Austen ; Coelorus ^ 

 by Pilsbry for E. cavicollis, Pils., to which two other species were 

 added subsequently ; Dolicheulota ^ created by Pilsbry for the 

 reception of two Bulimoid forms : B. [AmpJiidromus) formosensis, 

 Ad., and B. swinhoei, Pfr. 



In 1913 M. Germain proposed the genus HaloUmnohelix "^ for 

 tropical African mollusca, with a subgenus Massaihelix. Pilsbry 

 in an important article on land mollusks of the Belgian Congo ® adds 

 many new species with anatomical details, indicating its place in 

 the system near Eulotella and Trishoplita. At the same time he 

 suggests that all or several of the new genera introduced by Preston 

 as Zonitoid ® may be synonymous with or of subordinate rank to 

 Germain's genus. He also proposes two additional new genera — 

 Vicariihelix and Haplohelix — of similar affinities, each with one 

 species, 



A new genus — Stilpnodiscus — was created by Mollendorfi ^° for 

 the reception of three new Western China species with S. vernicina 

 as type. Its place in the system appears to be between Plectotropis 

 and Mgista. Sturany in the following year added a fourth species,^^ 

 S. euphyes. 



Trishoplita, a genus confined to Japan, was introduced by Jacobi ^^ 

 for T. pollens, Ehrm., and Helix goodwini, Smith, the latter classed in 

 Ganesella by Pilsbry. Many others have since been transferred 

 from Ganesella and new species described. It now totals twenty-two 

 species. 



Systenostoma was created in 1909 by Bavay and Dautzenberg ^^ 

 for two small Indo-Chinese species, and placed next to Plectotropis. 

 A third species was added in 1912 ^^ by them, when they judged 

 that the genus had affinity with Hypselostoma and Boysidia, a view 



1 Tom. cit., p. 76. 



^ Sitz.-Ber. Naturf. Ges. Leipzig, xxxviii, 1911, p. 61. 



3 Rec. Ind. Mus, viii, 1918, p. 604. 



* Tom. cit., p. 611. 



5 Proc. Acad. Nat. Sci. Philad., 1899 (Feb., 1900), p. 528. 

 -* Man. Conch., ser. ii, vol. xiv, 1901, p. 18 ; Introd., p. iii. 



■^ Bull. Mus. Paris, xix, p. 351. 



» Bull. Amer. Mus. Nat. Hist., xl, 1919, p. 36. 



9 Proc. Zool. Soc, 1914, pp. 795-803. 

 " Ann. Mus. Zool. St. Petersb., 1899, p. 65. 

 " Denkschr. k. Akad. Wiss. Wien, Ixx, 1900, p. 19. 

 1=2 Journ. Coll. Sci. Imp. Univ. Tokyo, xii, pt. i, 1898, p. 65. 

 1^ Journ. de Conchyl., Ivii, p. 196. 

 " Ib.,lx,p. 23. 



