STREPTAXTS. ' 77 



S. ABERRATUS, Souleyet. PL 15, figs. 65-67. 



Perforate, faintly arcuately striated, shining, pellucid, greenish 

 white, suture submarginate ; whorls 6-7, compressed around the 

 umbilicus ; aperture with a strong tongue-shaped parietal lamina, 

 and five teeth within the reflected lip, with corresponding exterior 

 scrobiculations. Diam., 10 mill. 



Cochin China. 

 S. THEOBALDI, Benson. PL 16, figs. 86, 14. 



Rimately perforate, thinly striate, striae stronger at the suture 

 and umbilicus, white, shining, suture impressed, submarginate; 

 who/ls 5^, the last compressed around the umbilicus, tri- 

 scrobiculate around the peristome ; peristome reflected, arcuate 

 above ; aperture seven-toothed, three teeth on the outer wall, 

 two on the base, two on the parietal wall. Diam., 6 mill. 



Khasia Mts., India. 



The dentition varies, as shown by fig. 14. 



S. DAFLAENSIS, Godwin-Austen. PL 15, figs. 74-76. 



Obliquely perforate, minutely striated, white, suture well- 

 marked ; whorls 6^, the last compressed below, near the umbili- 

 cus, so as to form a fold running up to a second and shorter fold 

 on the outer margin ; peristome slightly reflected ; parietal 

 lamina strongly developed and connected with the parietal 

 callus ; there are five lip teeth, the middle one furthest within 

 the aperture. Diam., 8 mill. 



Near Tanir Peak, Dafla Hills (4000 feet), Assam. 



Much larger, more lengthened and flatter than S. Theobaldi, 

 with a greater number of whorls, and more developed parietal 

 lamina. 



S. PYRIFORMIS, Pfeiffer. PL 15, figs. 61-63. 



Rimately perforate, thin, closely striate above, smooth below, 

 diaphanous, yellowish ; whorls 5^, scrobiculated at the aperture; 

 aperture with three lip teeth and a lamina on the parietal wall. 



Diam., 10 mill. 



IsL of Rodriguez. 

 S. WATSONI, Blanford. PL 15, fig. 64. 



Narrowly umbilicated, corneous white, shining, arcuately 

 striate above, obsoletely striulate below, with white lines 

 towards the suture of the last whorl ; whorls 6, with impressed 



