536 On Mollusca from British East Africa , &c. 



Trojndophora concinna, sp. n. (Fig. 28.) 



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

 whorl with a moderately broad peripheral 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 with 

 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. 



Ilab. Shimbi Hills, British East Africa. 



EXPLANATION OF THE PLATES. " 

 PfcAtf e VIT. 



Fig. I. Gibbulina expatriata, sp. n. Enlarged. 



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



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



Fig. 4. marionce, sp. n. Enlarged, X 7. 



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



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



Fig. 7. delieatula, sp. n. Enlarged, x 7. 



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



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



Fig. 10. martensiana, sp. n. Enlarged. 



Plate VIII. 



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



Fig. 12. (?) shimbiense, sp. a. Enlarged. 



Fig. 13. Thapsia exasperata, sp. n. Enlarged. 



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



Fig. 15. Phortion ariel,sy. n. Enlarged. 



.FzV/. 16. Rachis heiroglyphicus, sp. n. Enlarged. 



jFV/7. 17. vicinvs, sp. n. Enlarged. 



Fig. 18. Bidiminus (?) marguerites, sp. n. Enlarged. 

 .FY//. 19. (?) tribulation's, sp. n. Enlarged. 



Plate IX. 



J 7 ?^. 20. Achat ina iredalei, sp. n. Natural size. 

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



i*X</. 22 mathildce, sp. n. Enlarged. 



Fig. 23. pertranduceus, sp. n. Enlarged. 



.F/<7. 24. shimbiense, sp. n. Enlarged. 



JFY/7. 25. Homorus ordinarius, sp. n. Enlarged. 

 JFtys. 26, 26 a. Biomphalaria smithi, sp. n. Enlarged. 

 1%. 27. Aferulus lugubris, sp. n. Natural size. 

 ivy. 28. Tropidophora concinna, sp. n. Enlarged. 



