536 On MoUusca from British East Africa, &c. 



Tropidopliora cotieinna, sp. n. (Fig. 23.) 



Shell turbinately conic, flesh-colouv, painted on the last 

 whorl with a moderately broad periplieial band of reddish 

 purple, above which appear several indistinct and extremely 

 narrow bands of a lighter colour ; whorls 4, convex, the apical 

 whorls smooth, the later whorls sculptured throughout witii 

 rather closely set, revolving lirse ; sutures incised, umbilicus 

 rather narrow, deep, partly concealed by the reflexion of the 

 peristome ; peristome continuous, narrowly dilated, slightly 

 reflexed in the umbilical region ; aperture nearly circular. 



Alt. 11, diam. maj. 11, diam. min. 8"25 mm. 



Aperture: alt. 5'5, diam. 5 mm. 



JJab. Shimbi Hills, British East Africa. 



EXPLANATION OF TIIE PLATES. 

 Plate VIL 



Fig. ]. Gibhulina erpatriata, sp. n. Enlarg-ed. 



Fig. .2. Ennea quadriJatercdis, sp. n. Natural size. 



Fig. 3. givendolinece, sp. n. Enlarged, X 7. 



Fig. 4. 7wa?7on«, sp. n. Enlarged, X 7. 



Fig. 5, jod, sp. n. Enlarged, x 7. 



Fig. 6. sjjerabile, sp. n. Enlarged, X 7. 



Fig. 7. delicatula, sp. n. Enlarged, X 7. 



Fig. 8. radius, sp. n. Enlarged, X 7. 



Fig. 9. Martensia gwendolime, sp. n. Enlarged. 



Fig. 10. 7nartensiana, sp. n. Enlarged. 



PLiTE YIII. 



Fig. 11. Martensia mo7iozonafa, sp. n. Enlarged. 



Fig. 12. (?) shimbie7ise, sp. n. Enlarged. 



Fig. 13. Thapsia e.vasperata, sp. n. Enlarged. 



Fig. 14. insidsa, sp. n. Enlarged, X 7. 



Fig. 15. Phortion ariel,s^.i\. Enlarged. 



Fig. 16. Rachis heiroglgphiciis, sp. n. Enlarged. 



Fig. 17. vicimis, sp. n. Enlarged. 



Fig. 18. Buliminus (?) viargueritce, sp. n. Enlarged. 



Fig. 19. (?) tribulatiunis, sp. n. Enlarged. 



Plate IX. 



Fig. 20. AcJiatina iredalei, sp. n. Natural size. 

 Fig. 21. Curvella caloraphe, sp. n. Enlarged. 



Fig. 22 mathildce, sp. n. Enlarged. 



Fig. 23. jjertran^luceus, ?:^. n. Enlarged. 



Fig. 24. shimbiense, sp. n. Enlarged. 



Fig. 2-5. Hojnorus ordinarius, sp. n. Enlarged. 

 Figs. 26, 26 a. Biomphalaria sjnitki, sp. n. Enlarged. 

 Fig. 27. Aferuh's Ivguhris, sp. n. Natural size. 

 Fig. 23. Tropidophwa concimia, sp. n. Enlarged. 



