ELASMIAS. 129 



oped than in E. apertum and wakefieldia, and while all are 

 very closely related, E. cernicum seems to be distinguishable. 



Pfeiffer placed his T. mauritiana as a synonym of cernica in 

 the Monographia, where he substituted his description for that 

 of Benson. ' ' Tornatellina mauritiana Pfr. Shell ovate-conic, 

 thin, smooth, pellucid, corneous ; spire conic, somewhat obtuse \ 

 whorls 4%, a little convex, the last inflated, nearly equal to 

 the spire ; parietal lamella of the aperture median, compressed, 

 entering ; columella callus, glossy, with a high dentate trunca- 

 tion; aperture somewhat semioval; peristome simple, acute 

 and straight. Length 4, diam. 2y 2 , aperture 2 mm. long." 



Species of the Caroline, Marianne and Japanese Islands. 



12. E. OVATULUM (Moellendorff). 



Shell imperforate, conoid-ovate, thin, pellucid, very deli- 

 cately striatulate, a little glossy, pale buff. Spire short, con- 

 oid, the apex obtuse. Whorls 4, a little convex, parted by a 

 crenulate suture, rapidly increasing, the last large, rather 

 swollen. Aperture very oblique, oval; peristome unex- 

 panded, acute, the columellar margin very narrowly reflexed, 

 appressed. Parietal lamella rather elevated, spirally entering 

 a long distance. Columella strongly twisted, at the base 

 deeply excised bidentate. Alt. 3, diam. 2 mm. (Mlldff.). 



Caroline Is.: Ponape (Etscheid). 



Tornatellina ovatula MLLDFF., Journal of Malacology, vii, 

 March 24, 1900, p. 114. 



13. E. QUADRASI (Moellendorff). 



Shell imperforate, ovate-globose, thin, pellucid, delicately 

 striate, somewhat shining, pale buff-corneous; spire little ele- 

 vated, the apex rather obtuse; whorls 3~y 2 , a trifle convex, 

 rapidly increasing, the last large, swollen. Aperture moder- 

 ately oblique, oval, peristome simple, acute ; columellar mar- 

 gin very slightly reflexed, appressed. Parietal lamella 

 strongly elevated, spirally entering. Columella strongly 

 lamellarly dilated, deeply excised at the base in a right angle. 

 Length 2.5, diam. 2 mm. (Mlldff.). 



Marianne Islands (Quadras). 



