VOLUME XIX. 



THE FRESHWATER RHIZOPODA AND HEUOZOA 



OF COUNTY WICKEOW. 



BY JOHN HOPKINSON, F.I^.vS., F.G.S., F.Z-S. 



About forty- five years ago a few members of the Dublin 

 Microscopical Club commenced to exhibit and describe, at the 

 monthly meetings, fresh-water Rhizopoda and Heliozoa, mostly 

 collected in Ireland, occasionally in Wales, and once at least 

 in Scotland. The proceedings at these meetings were reported 

 in the Qtiarterly Joiuiial of Microscopical Science, and the 

 reports were reprinted in the Journal of the Club. The most 

 energetic worker in this field of research and in microscopic 

 pond-life generally was Mr. William Archer, the only other 

 members of the Club who appear to have collected and ex- 

 hibited Rhizopods being Dr. John Barker and Dr. Perceval 

 Wright. Unfortunately these observers did not as a rule state 

 where their specimens came from, and although we may 

 reasonabl}^ assume that they were collected in Ireland when 

 there is no statement to the contrary, we cannot be certain thai 

 such was the case. Occasionall}' however the locality was 

 given, more often the county only. 



To Mr. Bayley Butler we are indebted for the only attempt 

 yet made to put together the results of these and other in- 

 vestigators of the Protozoa of anv part of Ireland. In the 

 ' Handbook to the City of Dublin and Surrounding District,' . 

 issued to the members of the British Association at the meet- 

 ing in September, 1908, there are lists by him of Rhizopoda 

 and other Protozoa which have been recorded from the province 

 of Eeinster. The lists include eight species of fresh-water 

 Rhizopoda and eight of Heliozoa from Co. Wicklow. These 

 numbers do not tally with his, for he includes under the 

 Rhizopoda six species of Heliozoa; and the names of two 

 Wicklow species are S3'nonyms of others in the same list. 



At the close of this meeting of the British Association I 

 spent a week at Killough near Bray, on the Great Sugar-loaf 

 Mountain, and although the weather was unfavourable for the 

 collection of Rhizopods, every day being stormy, I obtained 



A 



