STREPTAXIS. 



sculpture above is finer ; the base around the umbilicus is rounded, 

 not compressed ; the parietal lamella less developed ; the mouth 

 more rounded ; the peristome on the outer side much less convex,, 

 and neither compressed nor tubercular. 



[Fig. Q.Streptaxis pfeifferi. x 158 & 296.] 



[The radula has the formula 29 . 1 . 29. The centre tooth! is 

 smaller than the first and second ; in one specimen examinedj the 

 centre tooth was quite rudimentary.] 



Length 8f, breadth 6, height 4| mm. 



Hob. Nicobar Islands ; Camorta, Katchall, Kar Nicobar. 



c. Ovately conoid ; penultimate ivhorl completely hidden from beneath 

 by body-whorl, ivhen seen in the direction of the aocis of the 

 upper whorls. 



8. Streptaxis solidulus, Stol. J. A. S. B. xl, pt. 2, 1871, p. 166, 

 pi. 7, fig. 10; Pfr. Man. Hel. vii, 1876, p. 494; H. $ T. C. I. 

 1876, pi. 98, fig. 7 : Nev. Hand-l. i, 1878, p. 3. 



Shell moderately umbilicated, whitish, solid, finely and flexu- 

 ously costulate above, smooth beneath ; spire conical; whorls 6^, 

 the upper flatly convex, penultimate rounded at periphery, body- 

 whorl by far the largest and deepest, slightly compressed around 

 the umbilicus ; aperture semioval, parietal lamella moderate ; 

 peristome expanded throughout, nearly in one plane, outer margin 

 scarcely arcuate. 



Length 12, breadth 9, height 7J mm. 



Hob. Near Moulmein, at Tethebiankoo on the Attaran Eivei . 

 Typical locality (Theobald). 



