HELIX-CHLORITIS. 249 



The last whorl is more defiexed in front than in unguiculastra. 

 H. breviseta Pfr. has a wider umbilicus. 



H. FLEXUOSA Pfeiffer. Unfigured. 



Shell umbilicate, depressed, rather solid, lightly striate, a little 

 shining, chestnut colored ; spire subplane, a trifle immersed in the 

 middle. Whorls 5, rapidly increasing, a little convex, above ir- 

 regularly spirally striate ; last whorl wide, subdepressed, a trifle de- 

 scending in front, base not compressed around the narrow umbilicus. 

 Aperture oblique, rotund-lunar, wider than high ; peristome lilac, 

 expanded, basal margin sloping, flexuous, reflexed. 



Alt. 11, greater diam. 30, lesser 25 mill. (Pfr.) 



" Borneo." 



H. flexuosa PFR. P. Z. S. 1855, p. 112 ; Monogr. iv, p. 292. MAR- 

 TENS, Preuss. Exped. nach Osta?., Landschn., p. 282. 



H. CERAMENSIS PfeifFer. Unfigured. 



Shell discoidal, narrowly umbilicated, lightly, rather widely 

 striated, shining, chestnut-rufous ; spire plane, a little immersed in 

 the middle ; suture moderately profound ; whorls 5, the last rounded, 

 deflexed in front ; aperture little oblique, transverse, semi-elliptical ; 

 peristome slightly thickened, pale violaceous. Alt. 15, greater diam. 

 35, lesser 26 mill. ; apert. long 20, alt. 16* mill. (Mart.) 



Island of Ceram, Moluccas. 



H. ceramensis PFR. P. Z. S. 1861, p. 192 ; Monogr. v, p. 386. 

 MARTENS, Ostas. Landschn. p. 283. 



Intermediate between unguiculastra and unguicula ; flatter and 

 more shining than the former, having a narrower umbilicus than 

 the latter. (Mart.) 



H. UNGUICULA Ferussac. PL 50, figs. 32, 33, 34. 



Shell inflated-discoidal, openly umbilicate, lightly striate, a little 

 shining, orange colored, with a little-distinct whitish band above, and 

 a wide umbilical whitish tract ; spire little immersed, nearly plane. 

 Whorls 5J, suture rather deep ; last whorl swollen, rounded, its base 

 concave', slightly descending in front. Aperture diagonal, broadly 

 lunar, peristome rather widely expanded all around, of the color of 

 the shell, columellar margin dilated at the insertion. 



Alt. 18?, greater diam. 38J, lesser 30 mill.; apert. long, 20i, lat. 

 19 mill. 



Alt. 13, greater diam. 22, lesser 20 mill. 



Ceram and Amboyna, Moluccas. 



