224 HELICOKi'YLA. 



H. scbadenbergi Mlklff., 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. bruguieriaua Pfr., vii, 166. 



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

 H. magistra Pfr., vii, 164. 



Section Trachystyla Pilsbry, 1892. 



Truchyxtyhi PILS., Man. Conch., vii, 166. 



Shell solid, depressed, dark colored, with a (hill ashen, hydrophan- 

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

 oblique, straight; surface dull and wrinkle malleated. 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, 

 Saniar, Bohol, Leyte and Lu/on. 



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



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



/ (Uonacea 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 Hclicostyla FtT., (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 77. mir<tl>ilis Fer., 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. 



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



perximilisDh. H. ? plurizonata A. & R., vii, 183.. 



Group of H. collodes. 



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



H. indusiata Pfr., vii, 184. H. suprabadia Semp., viii, 240. 



