GUDE : CHANGES IN CLASSIFICATION OF HELICES. 155 



for three species from Formosa and Japan with Ganesella 

 sphceroconus, Pfr., as type. 



Two more Bulimoid forms — B. siamensis, Eedf., and B. rhom- 

 bostomus, Pfr. — were added as a subgenus to Satsuma by Ancey/ 

 i.e. Giardia. 



Psadara, Miller, given by Pilsbry as a synonym for Solaropsis, 

 is stated by Von Ihering ^ to differ in its anatomy, and he quotes 

 twenty-one species under it. 



The genus Dorcasia, Gray, was split up into two genera by Pilsbry^ : 

 first, Dorcasia, with H. alexandri, Gray, as type, and four other 

 species ; second, Trigonephrus, with H. glohidus,MMl\., as type, and 

 six other species. Melville and Ponsonby added to Dorcasia a sub- 

 genus, Tulbaghina,^ with two species, while Connolly ^ raised the 

 latter to specific rank. 



Oxychona, Morch, with twelve species, was classified by Pilsbry 

 in Belogona Euadenia (Helicinse), next to Polymita ; Leptarionta, 

 Crosse & Fischer, was regarded by him as a synonym. Sub- 

 sequently he split up the group, ^ removing Oxychona, type H. 

 hifasciata, Burr, and three other Brazilian species to Bulimulidse, 

 and restoring Leptarionta to independent status, with the remaining 

 eight Mexican and Central American species, to remain in Belogona 

 Euadenia (Helicinse). 



A new genus of slug-like, dart-bearing Helicidse was announced 

 by Pilsbry in 1900,'' under the name of Metostracon, with one species, 

 M. mima, which he proposed to place near Epiphragmophora and 

 Cepolis, where at the same time he classed the genus Xanthonyx, 

 created by Crosse & Fischer ® for the reception of Simpulopsis 

 Gordovanus, Pfr., and S. salleanus, Pfr. 



Oreohelix was proposed in a short notice by Pilsbry ^ for the group 

 of Helix strigosa, Gld., previously classed in the subgenus Patula 

 of Pyramidula. The following year '" he properly defined the genus 

 and gave anatomical details, placing it near EpipTiragmopTiora, and 

 creating a new subgenus — Radiocentrum. Eleven years after ^^ 

 he gave still further anatomical data with a list of twenty-four 

 species and numerous subspecies and varieties. 



Another new gemis-r-Sonorella — with similar afiinities, was 

 proposed by him,'^ based on Epiphragmophora hachitana, Dall, 



1 Bull. Sci. Fr. Belg., xl, 1906, p. 195. 



2 Rev. Mus. Paul., iv, 1900, p. 539. 



3 Proc. Malac. Soc, vi, 1905, p. 286. 



* Ann. Mag. Nat. Hist., ser. vii, vol. i, 1898, p. 28. 



5 Ann. So. Afr. Mus., xiii, 1915, p. 173. 



« Nautilus, xi, 1897, p. 87. 



■^ Proc. Malac. Soc, iv, 1900, p. 24. 



8 Joum. de Conchyl., 1867, p. 223. 



" Nautilus, xvii, 1904, p. 131. 

 1" Proc. Acad. Nat. Sci. Philad., 1905, p. 268. 

 " lb., 1916, p. 340. 

 " lb., 1900, p. 556. 



