130 CTCLOPHORID^. 



Subgenus SIPHONOCYCLUS, MoUendorff. 



Hhiostoma (part.), Benson, A. M. N. H. ser. 3, v, 1860, p. 90. 

 Sijjhonoci/clus, Molleudorff, Nachr. Ueuts. Malak. Ges. xxxii, 1900, 



pp. 135, 136 ; Kobelt, Das Tierreich, Lief. 16, 1902, p. 208; id., 



Conch.-Oab., Cycloplioiidae, ii, 1911, p. 813. 



Type, Pterocydos tener, Menke. 



Bange. Burma, Farther India, South Cliina, Hainan. 



Shell with sutural tube as in Ojnsthojwyus. Operculum normal. 



181. Cyclotus gordoni, Benson. 



OpistJioporui^ i/ordoni, Benson, A. IM. N. H. ser. 3, xi, 1863, p. 322 ; 



I'feiffer, Mon. Pneum. Suppl. 2, 1S65, p. 36 ; Kobelt & Mijllen- 



dortf, Nachr. Deuts. Malak. Ges. xxix, 1897, p. 118 ; id.. Cat. 



Pneum. 1899, p. 30. 

 Spiraculwn ^oyf/o?i?, Blanford, A. M. N. H. ser. 3, xiii, 1864, p. 451 ; 



Theobald, J. A. S. B. xxxix, 1870, ].. 399, pi. 18, fig. 6. 

 Spiracubim (Opisthojwrus) gordoni, Theobald, Cat. Shells Brit. 



India, 1876, p. 38. 

 Pterocyclo)^ [Spiraculum) qordoni, Hanlev & Theobald, Conch. Ind. 



1870, pi. 49, figs. 9, 10.' 

 Fterocycbis {Spiraculum') gordoni, Nevill, Hand List, i, 1878, p. 264. 

 Procyclotus (Siphonocyclus) qordoni, Molleudorff, Nachr. Deuts. 



Malak. Ges. xxxii, 1900, p! 137. 

 Cyclotus {Siphonocyclus) gordoni, Kobelt, Das Tierreich, Lief. IG, 



1902, p. 209, fig. 43; id., Couch.-Cab., Cyclophoridae, ii, 1911, 



p. 820, pi. 123, figs. 15, 16. 



Original description: — " O. testa late et concave umbilicata, 

 depi'essa, discoidea, confertim striata, sub lente striis niinutis 

 spiralibus, nonnuUis elevatiusculis, decussata, albida, strigis 

 fulguratis castaneis fasciaque f usca dentata ad peripheriam ornata; 

 spira planata, apice nou elevato obtuso, sutura profunda, dennuu 

 canaliculata ; anfractibus 5, gradatim accrescent ibus, convexis, 

 ultimo rotundato, antice descendente, pone alam breviter soluto, 

 4 millim. pone aperturani spiraculo suturali brevi retrorsum 

 sppctante, nonnun(]uam subobsoleto, nuniito; apertura valde 

 obliqua, circular!; peristomate duplici, interno prope anfractum 

 penultimum breviter inciso, exteriore superne et ad dextram 

 angulatim expanso, ala intus concava insuper anfractum penul- 

 timum antrorsum asceiulente munito. 



"Diam. major 22-23, minor 17-19, axis 5-G mill." (Benson.) 



Bah. Burma : Moulmain [Gordon). 



Section CYATHOPOMATE^. 



Genus CYATHOPOMA, Blanford. 



Cyathoponia, Blanford, J. A. S. B. xxx, 1861, p. 348 (nom. nud.) ; id., 



'a. M. N. H. ser. 3, xiii, 1864, p. 449; id., Jouni. ConchyL xvi, 



1808, p. 257; PfeiHer, Mon. Piieum. Suppl. 3, 1875, p. 23; 



