HELICOSTYLA. 231 



H. balanoidea Jonas, viii, 44. H. brevicula Pfr., viii, 45. 

 H. stabilis Sowb., viii, 45. H. velata Brod., viii, 12. 



v. elongata Mlldff. 



Section Prochilus Albers, 1860. 



Prochilus ALB., Die Hel., p. 179, type Bui. virgatus. 



Shell narrowly perforated, of an elongated ovate-pyramidal long- 

 spired form, smooth and shining. Aperture less than half the length 

 of shell; peristome very broadly reflexed. Soft anatomy unknown. 

 Type H. virgata Jay, pi. 53, fig. 9. 



Strikingly handsome elongated shells, confined to Mindoro and 

 the Cuyos Is. 



H. calobapta Jonas, viii, 46. H. virgata Jay, viii, 48. 



euyoensis Rve. labrella Grat. 



H. euyoensis Pfr., viii, 47. v. porracea Jay. 



H. fictilis Brod., viii, 47. v. sylvanoides Semp. 



v. larvata Brod., viii, 48. v. pulchrior Pils. 



H. nigrocincta Semp., viii, 50. H. dryas Brod., viii, 49. 



pan Pfr., not Brod. paradoxus Pfr. 



H. mercurius Pfr., viii, 50. H. partuloides Brod., viii, 50. 

 II. calamianica Q. & M., Nachr., 

 '95, 99. 



Section Chrysallu Albers, 1850. 



Chrysallis ALB., Die Hel., p. 140 (in part). v. Mart., Die Hel., 

 1860, p. 179, type B. chrysalidiformis. 



Shell perforated, elongated ovate-conic, solid, opaque and not 

 smooth; aperture ovate, less than half the shell's length; lip 

 broadly expanded ; columellar margin dilated and reflexed; hy- 

 drophanous cuticle usually present. Soft anatomy unknown. Type 

 H. chrysalidiformis Sowb., pi. 53, fig. 8. 



Evidently allied to Prochilus. Inhabits Mindoro only. 



H. chrysalidiformis Sby., viii, 51. H. mindoroensis Brod., viii, 52. 



v. ustulata Jay. wagneri Grat. 



v. antonii Semp. aspersus (part) Grat. 



H. electrica Rve., viii, 53. melanogaster Morch. 



lichenifer Morch. 



/. cailliaudi Petit. 



