224 HELICOSTYLA. 



H. schadenbergi Mlldff., vii, 160. v. gloynei Sowb., vii, 165. 

 H. pfeifferi Semp., vii, 162. ecarinata MlldfF. 



cumingi Pfr., preoc. H. moreleti Pfr., vii, 165. 



H. phloiodes Pfr., vii, 163. H. montfortiana Pfr., vii, 165. 



H. carbonaria Sowb., vii, 163. H. bruguieriana Pfr., vii, 166. 



/. rubeus Mlldff. H. beloni Jouss., Le Nat., '94, 186- 

 H. magistra Pfr., vii, 164. 



Section Trachysiyla Pilsbry, 1892. 



Trachystyla PILS., Man. Conch., vii, 166. 



Shell solid, depressed, dark colored, with a dull ashen hydrophan- 

 ous cuticle; spire low; whorls few and rapidly widening ; columella 

 oblique, straight; surface dull and wrinkle malleuted. Type H. 

 cryptica. 



Species of this group live on the ground under leaves, etc. ; and 

 while the shell differs widely from arboreal Helicostylas, the soft 

 anatomy is the same. The few species inhabit eastern Mindanao, 

 Samar, Bohol, Leyte and Luzon. 



H. cryptica Brod., vii, 167. v. panayensis Semp., vii, 168. 



v. latitans Brod., vii, 167. v. tumida Mlldff. 



fdionacea Dh. v. subglobosa Mlldff. 



v. depressa Mlldff, 1893. v. nigricans Mlldff. 



v. cretata Brod., vii, 168. v. cineracea Semp., vii, 168. 



v. minor Mlldff. H. dataensis Semp., vii, 169. 



Section Helicostyla Fer., (restricted). 



After the removal of Cochlodryas, Pachysphcera, etc., a consider- 

 able number of oblong shells grouping around H. mirabilis, meta- 

 formis and fenestrata remain to represent this section, the type of 

 which is H. mirabilis Fe"r., pi. 53, fig. 7. 



Group of H. mirabilis, 



H. mirabilis Fer., vii, 181. f. trichroa Pils.,vii, 182. 



formosa Wood. v. fulgens Sowb., vii, 182. 



galaetites Lam. H. tephrodes Pfr., vii, 183. 



persimilis Dh. H. ? plurizonata A. & R., vii, 183. 



Group of H. coUodes. 



H. collodes Sowb., vii, 184. H. thomsoni Pfr., vii, 185. 



H. indusiata Pfr., vii, 184. H. suprabadia Semp., viii, 246. 





