66 



Proceedings of the Royal Irish Academy. 



previous work of men such as Brown, Templeton, Thompson, Hyndman, 

 Warren, Waller, Harvev, Clarke, Andrews, Ball, Humphreys, Hogan, and 

 Tate, but a great deal of his own work, the result of many exeui-sions and much 

 careful research. His attention was directed chiefly to the south-west comer 

 of Ireland, the haunt of GcomaJacus niaeulosus and Limnaea involuta. The 

 result of his work in that quarter was the addition to our f aima of Pisidium 

 htbernicum (which, like Zimnaea involuta, is apparently an endemic species) 

 and a series of interesting notes on some of the other and commoner species 

 found there. In liis paper Dr. Scharff recorded 120 species, of which four 

 were given as doubtful and have since been withdrawn; three others 

 are not now included in the Irish hst — ^viz., Sphacriv.m rivicola, Palvdina 

 rivipara, and Limnaea glabra : while Hyalinia contrada is now regarded as a 

 variety of H. crystallina. The shells recorded by Dr. Scharft' as Hclb: scritea, 

 Drap., and Vertigo moulinsiana, Dupuy, were in reahty Hygromia grojnidaia, 

 Alder, and Vertigo lilljeborgi, Westerlund ; while the specimens fi-om Lough 

 Drin, near Mullingar, recorded as Pisidium globidarc (= P. stcenbuchi) are now 

 considered by Mi-. B. B. Woodward to be a form of Pisidium pu-sUlu7ii. 



The following table shows the number of species recorded for each 

 division up till the close of the years 1900 and 1910 respectively:-^ 





XOIBER 



OF .SPECnfS RECO 



RDED 



FEOil EACH DITISIOX. 









In ISOO 



In 1910 







In 1900 



In 1910 



1. 



South Kerry, 



. 60 



85 



21. 



Dublin, 



. 55 



98 



2. 



Xorth Kerry, 



53 



75 



'2'2. 



Meath, 



1 



87 



3. 



West Cork, . 



. 13 



80 



iZ. 



Westmeath, . 



57 



70 



4. 



Mid Cork, . 



16 



80 



24. 



Longford, 



2 



51 



5. 



F.i^tCork. . 



23 



83 



25. 



lloscommou, 



4 



67 



6. 



Waterfoid, . 



. 24 



S3 



26. 



East ifayo, . 



12 



42 



7. 



South Tipperary, 



. 52 



81 



27. 



West May.., 



53 



88 



8. 



T.inierick, 



. 28 



85 



28. 



Sligo, . 



22 



85 



9. 



(Hare, . 



. 40 



103 



29 



Leitrim, 



25 



71 



10. 



Xorth Tipperary, 



69 



85 



30. 



C'avan, 



35 



68 



11. 



Kilkennv, . 







88 



31. 



Louth, 



5 



87 



12. 



Wexford, 



6 



80 



32. 



Mouaghan, . 



15 



73 



13. 



Carlow, 



1 



87 



33. 



Fermanagh, 



32 



78 



14. 



Queen's Co., 



. 28 



84 



34. 



East Donegal, 



33 



83 



15. 



South-east Galwa; 



r, 1 



79 



35. 



West Donegal. 



71 



87 



16. 



West Galway, 



. 52 



82 



36. 



Tyrone, 



11 



62 



17. 



Xoith-east (jalwa^ 



r, 52 



81 



37. 



Armagh, 



20 



75 



18. 



King's Co., . 



. 35 



80 



38. 



Down, 



49 



87 



19. 



KiLdare, 



. 31 



81 



39. 



Antrim, 



( ( 



96 



20. 



Wicklow, 



. 42 



73 



40. 



Derry, . . 



37 



88 



