STBEPTAXIS. 5 



Hel. v, 1868, p. 151 ; Stol (Streptaxis) J. A. S. 3. xl, pt. 2, 1871, 

 p. 167 ; Theob, J. A. S. B. xlv, pt. 2, 1876, p. 186, pi. 14, fig. 6; 

 H. $ T. (Helix) C. I. 1876, p. 15, pi. 31, figs. 1, 4 (immature 

 shell) ; id. (Streptaxis) t. c. 1876, p. 63, pi. 156, fig. 9 ; Nev. 

 Hand-l i, 1878, p. 3. 



Similar to S. petiti, but larger and longer in proportion to the 

 breadth, with the penultimate whorl much deeper and rounded at 

 the periphery ; last whorl subangulately compressed at the base 

 behind the peristome, right margin of peristome but slightly 

 arcuate. 



Length 15, breadth 9-5, height 8-5 mm. ; of a similar form 12, 8, 

 and 7*5 mm. 



Hob. Moulmein. Some of the immature specimens originally 

 called Helix lombax were from Phietan, Tenasserim. 



3. Streptaxis andamanicus, Bs. A. M. N. H. (3) vi, 1860, p. 192 ; 



Ffr. Mon. Hel v, 1868, p. 444; H. $ T. C. I. 1876, pi. 8, f. 6; 

 Meo. Hand-l. i, 1878, p. t 2 j [ Godwin-Austen, P. Z. S. 1895, p. 443]. 



Shell umbilicated, with arcuate costulate striation above, smooth 

 beneath ; whorls 5J, convex above, the penultimate rounded ; 

 breadth across body-whorl scarcely greater than across penultimate 

 whorl when viewed from below, and last whorl rounded, not com- 

 pressed, around the umbilicus ; aperture a truncated oval, slightly 

 compressed on the outer edge; peristome white, expanded, the 

 outer border arcuate. 



Length 8, breadth 5|, height 4 mm. 



Hab. Andaman Islands. 



4. Streptaxis blanfordi, Theob. J. A. S. B. xxxiii, 1864, p. 245 j Neo. 



Hand-l i, 1878, p. 2 (Arakan & Pegu). 



Streptaxis blanfordiauus, Stol. J. A. S. B. xl, pt. 2, 1871, p. 163, 

 pi. 7 [fig. 8 (Arakan), fig. 9 (Pegu)] ; Pfr. Mon. Hel. vii, 1876, 



Streptaxis burmanica, H. Sf T. (nee Blanford) C. I. 1876, pi. 8, fig. 6. 

 [Streptaxis btanfordi, var., Godwin-Austen, P. Z. S. 1895, p. 443.] 



Very near S. andamanicus, but rather more narrowly umbili- 

 cated, slightly compressed around the umbilicus, and usually with 

 a distinct tubercle inside the outer border of the peristome, the 

 outer margin of which is less arcuate. 



Length 7|, breadth 5, height scarcely 4 mm. 



This appears to be merely a variety of 8. andamanicus. 



Hab. Arrakan, Pegu, Shan States ; Cocos Islands. 



5. Streptaxis layardianus, Bs. A. M. N. H. (2) xii, 1853, p. 90; 



Pfr. Mon. Hel. iv, 1859, p. 332 ; id. t. c. vii, 1876, p. 495 ; H. $ T. 

 C. I. 1876, pi. 98, figs. 1, 4 ; [Nev. Hand-l. i, 1878, p. 4]. 



Shell perforate, subumbilicated, striated, whitish ; spire low, 

 convex ; whorls 6|, convex above, penultimate rounded, the last 



