190 HELIX-RHAGADA. 



*** 



Species from the Malay Archipelago. 



H. COLONA Martens. Vol. IV, pi. 36, figs. 37, 38. 



Shell narrowly umbilicated, globose-depressed, sculptured above 

 with oblique parallel close folds ; whitish, with obsolete translucent 

 bands; whorls 4J, convex, separated by deep sutures, the first 1J 

 smooth, last whorl rotund, rather smooth beneath, descending in front. 

 Aperture very oblique, truncate-ovate; peristome thick, white, 

 upper margin not expanded, arched, lower a little expanded, 

 columellar margin reflexed, half covering the umbilicus ; parietal 

 wall of the aperture with a distinct callus. (Martens.) 



Alt. 7, greater diam. 11, lesser 9 mill.; aperture alt. 5J, breadth 

 6 mill. 



On Cypresses, Island of Dana, south-west of Timor. 



H. colona Martens, Monatsberichte der K. Preuss. Akad. Wissen- 

 schaften zu Berlin, 1877, p. 272, t. 1, f. 4, 5 ; Novit. Conch, v, p. 36, 

 t. 143, f. 20-23. 



Differs from If. plectilis and carcharias its nearest allies, in 

 sculpture. It is a smaller species than H. solorensis. 



H. SOLORENSIS Martens. Vol. IV, pi. 36, figs. 31, 32. 



Shell nearly covered perforate, depressed globose, compact, opaque 

 white with numerous spiral brown bands, of which one at the peri- 

 phery is broader. Whorls 5-5 J, the last descending in front; per- 

 istome thick, white, expanded, nearly closing the umbilicus by its 

 dilated columella. 



The shell is solid, strong, opaque, compact, ivory-white with brown 

 bauds, sometimes light brown on the whole upper surface. The 

 bands cease before reaching the edge of the lip, leaving the back of 

 the expanded peristome white, like its thick, convex face. Aper- 

 ture oblique, half-oval, rather dark and showing the bands within ; 

 baso-columellar lip straight, sloping, widened, spreading in a shining 

 callus pad at the nearly closed umbilicus. 



Alt. 11 J, greater diam. 16J, lesser 14 mill. 



Alt. 14J, greater diam. 21, lesser 17 mill. 



Id. of Flores (east coast) ; and Solor, East Indies. 



H. solorensis MARTENS, Mai. Bl. x, 1863, p. 179 ; Ostas. Conchyl., 

 p. 277, t. 17, f. 3. WALLACE, P. Z. S. 1865, p. 408. PFR. Monogr. 

 v, p. 353. 



