378 The Molluscan Family Planorbidae 



PLATE 71 



Isidora and Afroplanorbis 



1-6. Isidora globosa (Morelet). Copied from Connolly, Trans. Royal Soc. South 

 Africa, XII, plate 8. 



1. Posterior end of penis (verge) with its sheath split open, showing the junction 



of the vas deferens with the penis (verge). Fig. 11. X 11. 



2. Alimentary canal and salivary glands seen from above. Fig. 12. X 6. 



3. Reproductive organs (genitalia). Fig. 14. X 5. 



4. Animal without its shell, seen from the left side. Fig. 13. X 3. 



5. Pulmonary orifice, with the folded branchial tube, anus, etc., on the right of it. 



Fig. 8. X 5. 



6. Posterior end of penis (vergic sac) showing penis papilla, this specimen ex- 



hibiting a different condition from that seen in fig. 1. Fig. 15. X 12. 



7-9. Planorbis pfeiffcri Krauss {^= Ajroplonorbif< pjeifjeri (Krauss)). Copied from 

 Connolly, as noted above, plate 8. 



7. Lobes beneath the pulmonary orifice, seen from above. Fig. 17. X 8. Includes 



pseudobranch and rectum. 



8. Buccal mass, salivary glands, oesophagus, stomach, caecum, and first loop of 



intestine. Fig. 19. X 6. 



9. Reproductive organs (genitalia). Fig. 18. X 8. 



lQ-\2. Planorbis adowensis Bourg. (== Afroplanorbis adoweyisis (Bourg.)). Copied 

 from Pilsbry, Proc. Acad. Nat. Sci. Phil., LXXXVI, p. 53. 



10. Genitalia showing spermatheca, prostate, uterus, etc. Fig. G. 



11. Male organ (penial complex) showing preputium and verge. Fig. F. 



12. Preputium cut open to show pilasters and end of verge, the verge indicated by 



dotted lines, u. s. upper sac (vergic .sac). Fig. H. 



Figures are great Iv enlarged 



