HELIX-OBBA. 217 



or wholly closing the umbilicus, its inner edge obscurely one or 

 two-dentate. Terminations of peristome approaching, joined by a 

 narrow cord of white callus. 



Alt. 23, greater diam. 25 i, lesser 21 mill. 



Alt. 23, greater diam. 26, lesser 21 mill. 



Northern Celebes. 



H. papilla MULLER Hist. Verm, ii, p. 100. FER. Hist. t. 25 B, 

 f. 5. PER. in Kiister's Conchyl. Cab., p. 157, t. 21, f. 8, 9 ; Monogr. 

 Hel. Viv. i, p. 318. REEVE, Conch. Icon. f. 488. MARTENS, Ostas. 

 Landschn., p. 292. DOHRN in Kiister's Conchyl. Cab., p. 601, t. 

 175, f. 11, 12. Obba papilla BECK, Index, p. 30. WALLACE, P. 

 Z. S. 1865, p. 408. 



Easily known by its elevated pupa-like form. It is certainly not 

 a true Obba, but an Obbina, closely allied to H. planulata, etc., of 

 the Philippine Islands, and especially to the following species. 

 Some specimens are distinctly conoidal, others more pupiform. 



H. HEROICA Pfeiffer. PL 55, figs. 42, 43, 44. 



Shell umbilicated, depressed-conoid, solid, sculptured with coarse, 

 irregular, oblique wrinkles, whitish, spotted and interruptedly 

 banded with brown ; spire convex, apex obtuse, livid ; whorls 4J-5, 

 a little convex, slowly increasing, the last shortly deflexed in front, 

 with angulated periphery, the base scarcely convex, swollen behind 

 the basal lip, and then constricted. Aperture very oblique, ellip- 

 tical ; peristome subcontinuous, white ; upper margin broadly ex- 

 panded, basal flexuous, dilated, reflexed, half-covering the umbili- 

 cus ; having a transverse tubercle, sometimes bifid, on its inner edge. 

 (Z)o/trw.) Alt. 12-14, greater diam. 23, lesser 14 mill. 



Around Manado, northern Celebes. 



H. heroica PER. P. Z. S. 1855, p. 114; Monogr. Hel. Viv. iv, p. 

 291. DOHRN in Kiister's Conchyl. Cab., p. 600, t. 175, f. 8-10. 

 H. {Obba} papilla var.f MARTENS, Ostas. Landschn., p. 292. 



Smaller than H. papilla, the umbilicus less concealed, the form 

 far more depressed. 



H. GOLDIEI Brazier. PI. 58, figs. 37, 38. 



Shell large, nearly-covered-umbilicate, depressed, about equally 

 convex above and below, carinated. Yellowish, speckled with 

 lighter buff, irregularly mottled with blackish. Surface roughened 

 by irregular, spirally-descending wrinkle-like malleations. Mouth 



