TORNATELLINA. 141 



3. T. RINGENS Dohrn. Not figured. 



Shell conic, rather thin, striatulate, fulvous-corneous. Spire 

 conic, acute; suture impressed. Whorls 7, a little convex, 

 slowly increasing, the last subangular in the middle, at the 

 base slightly depressed. Aperture rhombic-elliptical, ob- 

 structed by 4 or 5 folds : 1 on the parietal wall, oblique, strong, 

 compressed, <crested; 1 or 2 columellar, varying; 1 or 2 palatal 

 plicae, the lower compressed, upper tuberculiform. Length 

 5~y 2 , diam. 3, length of aperture 214 mm. (Dohrn). 



Philippine Islands (A. Fokkes in coll. 0. Semper). 



Tornatcllina ringens DOHRN, Malak. Blatter, x, 1863, p. 161. 

 -PFR., Monographia Hel. Viv., vi, 265. 



It agrees remarkably in figure with T. philippii, but the 

 dentition is wholly different. The parietal fold is alike in the 

 two species. The columella in our species is calloused and 

 bears one or two lamellae of unequal size, the upper being 

 much smaller and deeply-seated, sometimes wholly vanishing, 

 the lower very strongly developed, callous, generally bifid 

 within, seldom simple inside and bifid outwardly (as Pfeiffer 

 described for T. gouldi). There are also two palatal teeth 

 standing on a transverse callous, the lower tooth compressed, 

 the upper small, tubercular, sometimes disappearing. The 

 callous is deposited anew at various periods of growth 

 (Dohrn). 



4. T. GOULDI Pfeiffer. Not figured. 



Shell ovate-conic, thin, smoothish, pellucid, corneous. 

 Spire long-conic, the apex rather obtuse. Whorls S 1 /^, con- 

 vex, the last nearly two-fifths the length, rotund. Aperture 

 oblique, erect-lunar, obstructed by a strong entering parietal 

 lamella and a thick subtriangular columellar fold. Peristome 

 unexpanded, thin. Length 4, diam. 2.5 mm., aperture 

 mm. long (Pfr.). 



Habitat unknown (Cuming coll.). 



Tornatdlina gouldi PFR., P. Z. S., 1856, p. 335; Moiiogr., iv, 

 651. 



''Similar to T. philippii, from which it differs chiefly by the 

 prominent subtriangular columellar fold ' (Pfr.}. Known 



