260 HELIX-CHLORITIS. 



H. SULCOSA Pfeiffer. PL 49, figs. 12, 13, 14. 



Shell urnbilicated, convex-depressed, rather solid, minutely striat- 

 ulate and punctate, unicolored, chestnut ; spire little convex, obtuse; 

 whorls 5J, rather flattened, the last inflated, sculptured with malle- 

 ations and irregular subspiral furrows, the side opposite the aper- 

 ture somewhat swollen ; last whorl not descending in front, sub- 

 compressed and excavated around the moderate umbilicus. Aper- 

 ture little oblique, lunar, livid inside ; peristome broadly expanded 

 all around, margins slightly converging, the right one much arched, 

 basal lightly arched, columellar margin dilated above, vaultedly 

 reflexed. Alt. 22, greater diam. 43, lesser 34 mill. (Pfr.) 



Aru Islands. 



H. sulcosa PFR., Mai. Bl. i, 1854, p. 65 ; Novit. Conch, i, p. 1, t. 

 1, f. 1-3 ; Monogr. iv, p. 287. REEVE, Conch. Icon. f. 1350. Seini- 

 cornu sulcosa Pfr. WALLACE, P. Z. S. 1865, p. 410. Helix (Sulco- 

 basis) sulcosa Pfr. TAPPARONE CANEFRI, Ann. Mus. Civ. Genov. 

 xix, p. 163, 1883. 



H. sulcosa being the first species given by Canefri may be consid- 

 ered the type of Sulco basis. 



H. RUBRA Albers. PL 48, figs. 1, 2, 3. 



Shell umbilicated, solid, lightly striate and irregularly, distantly 

 obliquely sulcate ; unicolored brick-red ; spire but little elevated ; 

 whorls 5J, little convex the last dilated and descending in front, the 

 base a little paler ; aperture ample, subdiagonal, oblique, lunate- 

 oval, with a pearly luster inside ; peristome simple, white, margins 

 joined by a sinuous callus, right margin expanded, basal reflexed, 

 columellar margin dilated. 



Alt. 23, greater diam. 65, lesser 50 mill. (Pfr.) 



My so I ; Aru Is. 



H. rubra ALB. Mai. BL iv, 1857, p. 93, t. 2, f. 1-3. PFR. Mon. 

 Hel. Viv. iv, p. 287. DOHRN, Conchyl. Cab., continuation, p. 569, 

 t. 168, f. 7-9. TAPPARONE CANEFRI, Ann. Mus. Civ. Genov. xix, 

 p. 166. 



H. BEATR[Cis Tapparone Canefri. PL 36, fig. 19. 



Shell globose-depressed, longitudinally striated, unicolored brown- 

 ish-chestnut under a thin buffish-green epidermis ; spire depressed, 

 a little convex, apex obtuse. Whorl 5J, regularly increasing, the 

 upper obsoletely impresso-punctate, the last large, inflated, in the 

 middle and beneath submalleated and encircled by little-impressed, 



