218 



Transactions of the Royal Society of South Africa. 



EXPLANATION OF PLATE IV. 



Note. — The small outlines given with enlarged figures merely rejjresent the actual 

 size of the shells ; they are not to be accepted as accurate in detail. 



1. Gonaxis cressyi Conn. Tyjie. Mtisherra R. \'alley. 



2. „ (Eustreptaxis) vengoensis Conn. Type. Macequece District. 



3. Gulella enneodon Conn. Type. Macequece District. 



4. „ laevigata (?) (Dhrn.). Maforga Siding. 



5. ,, praelonga Conn. Type. Moimt \'engo. 



6. ,, tristaoensis ,, ,, Macequece District. 



7. ,, nejyia ,, ,, ,, „ 



8. Sitala diaphana „ „ „ „ 



9. Trachijcystis ambirjxa Conn. Type. 



10. ,, sericea , 



11. ,, cressyi , 



12. ,, fossvla , 



13. ,, vicdowelli . 



14. ,, soror . 



15. ,, pura . 



16. ,, vengoensis. 



17. Punct'wiH' j)nllidi(')ii , 



18. Conulinus junodi „ „ Lebombt 



19. ,, sordidulus Mts. \\'anetsi River. 



20. „ tumidus (Gibbons) Type. Zanzibar. 



21. Rhachis jejuna (M. and P.). Lebombo Mountains. 



22. „ punctata (Ant.) {Type oi ferussaci T>kr.). Loanda. 



23. Kesojmpa vengoensis Conn. Type. Mt. \'engo. 



24. ,, bandulana ,, „ Bandula Sidins- 



Macequece District. 



Mt. Vengo. 

 Maforga Siding. 

 Mt. Vengo. 



jMountains. 



25. Opeas praecox 



26. ,, vengoense 



27. ,, cressyi 



28. Pseudoglessula cressyi 



29. Auriculastra acuta 



30. Hippeutis junodi 



31. Assiminea leptodonla 



Zangwe R. Basin. 

 Mt. Vengo. 

 Macequece District. 



Rikatla. 



EXPLANATION OF PLATE V. 



Gonaxis [Eustrepiaxis) elongatus (Fulton) ji'mi^., Macequece. 



1. Anterior view of head. The upper tentacles are retracted, and the front of the 



buccal mass is slightly protruded. 



2. Retractor muscles of the radula, seen from the right side ; X 5i. The dotted 



lines show the outline of the concealed radula-sac and front portion of its terminal 

 retractor. 



3. Anterior portion of alimentary canal witli odontophore and free retractor muscles, 



seen from the left side ; X Sg. 



