214 PUPILLA, AFRICA. 



Pupa endoplax. PL 16, fig. 23. Shell obese, cylindriform, 

 brown, thin ; whorls 6-7, a little impressed at the suture, some- 

 what swollen, longitudinally obliquely striate, the last whorl 

 rounded towards the base; aperture lunate-ovate; peristome 

 thickened, scarcely continuous, 4-f olded : an acuminate sutural 

 fold, a mamillate columellar, and two slightly curved internal 

 folds, not reaching to the peristome. Length 3, width 1.5 

 mm. Cradock, at roots of bushes (Farquhar). 



A curious and distinct form, with the peculiar internal 

 plaits just in front of the orifice, but not reaching the peri- 

 stome (M.<& P.). 



31. PUPILLA PUPULA (Desh.). PI. 17, figs. 12, 13, 17, 18. 



It is perfectly cylindric, equally obtuse at the ends, of 7 

 whorls; the first ones are flat, the following are moderately 

 convex and united by a simple, lightly impressed suture, in- 

 creasing very slowly and hardly noticeable ; the last whorl is 

 very short, and barely a third of the entire length. Very 

 obtuse at base, it is perforated in the center by a quite large 

 umbilicus. The aperture is small, but slightly oblique, a little 

 bent in on the right ; it is oval, semilunar, and when examined 

 under the lens a small white tooth which appears to run along 

 the wall is found. Equally deep within there are found on 

 the left, in front, two little teeth a little less elevated than the 

 first (and which the draughtsman did not represent, as they 

 are very deeply placed; cf. fig. 17). The margin is reflected, 

 and is thickened within by a little russet-white callus. The 

 whole shell is dark brownish-corneous, thin and semitrans- 

 parent. Its surface appears smooth, but oblique growth-striae 

 may be noticed under a sufficient magnification, especially 

 near the aperture. Length 3, diam. 1% mm. (Desh.). 



Island of Reunion (L. Maillard) ; abundant on large boul- 

 ders overgrown with creepers, near Salazie (Nevill). 



Pupa pupula DESHAYES, Cat. Moll, de Pile de la Reunion 

 (Bourbon), p. 92, pi. 11 (38), f. 2-4, 1863; in L. Maillard 's 

 Notes sur 'ile de la Reunion. PFR., Monogr., vi, 303. Ver- 

 tigo f pupula Dh., G. NEVILL, Journ. Asiat. Soc. Beng. 39, 

 1870, pt. 2, p. 412. 



Under the microscope the surface shows extremely fine, 

 close, somewhat anastomosing striae (in places apparently with 



