TESTACELLID.E. 



[Fig. 4. — Buccal mass, ganglia, Sec. of Strcpfaais obtitsa, (After Stoliczka.)] 



The measurements of Strepfaxis are the following : — The length 

 and breadth are the diameters of the shell as it rests on the body- 

 whorl ; the height is that of the shell laid on a flat surface at right 

 angles to the other two. 



Forms of this genus are common on the hills of Southern India, 

 and several of the species occurring appear to be widely spread 

 and very variable. The teeth in the peristome vary in number 

 and position, and even the number of the parietal lamella? is not 

 always constant, whilst important differences may be found at 

 times in the shape of the shell. 



I. Peristome edentulous or nearly so (occasionally a small 

 tubercle inside right margin). 



A. Penultimate tvJiorl rcunded or hhintly annulate, not heeled ; 

 a single j^arietal lamella. 



a. Dej^ivessedly ovate ; penultimate ivJiorl, seen from beneath, 

 extends half its ividth beyond body-ivhorl. 



1. Streptaxis petiti, Goidd (Helix-Streptaxis), Bost. Jour. N. H. iv, 



1844, p. 45G ; Pfr. (Streptaxis) Mon. Hel. i, 1847, p. 8 ; id. t. c. 

 vii, 1876, p. 494 ; H. ^- T. C. J. 1876, pi. 8, fio-. 4 ; Nev. Hand-l. i, 

 1878, p. 3. 



Shell umbilicated, translucent, whitish, finely, closely, and 

 flexuously costulate above, smooth beneath ; spire depressedly 

 conoid ; whorls Qh, convex, penultimate whorl subangulate, last 

 whorl flatly convex beneath, compressed around the umbilicus; 

 aperture a truncated oval ; peristome white, expanded throughout, 

 outer margin much curved forward. 



Length 10, breadth 7, height 64 mm. 



Hab. Tavoy and Mergui, Tenasserim ; ? Moulmein. 



2. Streptaxis bombax, Bs. (Helix) A.M.N. H. (8) iii, 1859, p. 186; 



Theoh. J.A.S. B. xxviii, pt. 2, 1859, p. 308 ; Pfr. (Helix) Mon. 



