62 DUBLIN UNIVERSITY 



Letters were read from P. H. Gosse, F. R. S., Professor Redfern, 

 Dr. Lankester, Rev. T. Hincks, acknowledging their election as Corre- 

 sponding Members ; and from Mr. Gt. V. Du Noyer and Mr. D. Moore, as 

 Associate Members; and thanking the Association for this mark of dis- 

 tinction. 



The Rev. Eugene O'Meara read the following — 



CATALOGUE OP DIATOMACEiE COLLECTED IN POWERSCOURT, COUNTY OF 



WICELOW. 



The excursion of the Association of July 1857, may still be in the recol- 

 lection of the Members. We assembled to an early breakfast, at the resi- 

 dences of our then Senior Vice-President (now our esteemed President), and 

 of one of our Honorary Secretaries. Having done j ustice to the hospitality 

 provided for us, we prepared for a drive of some ten or twelve miles 

 ere the proper business of the day could begin. Headed by Professor 

 Harvey, who took the lead of the botanists ; Mr. Haliday, who reigned 

 supreme among the entomologists ; and Mr. Du Noyer, who kindly 

 commanded the army of geologists, — we drove along the pretty mountain 

 road that leads to the village of Enniskerry. The morning was all that 

 could be desired : a clear blue sky above us faded off in the horizon into 

 a pale white mist, that gave promise of a glorious day. Dublin Bay 

 glittered beneath our feet, sparkling with the rays of a July sun. In 

 about an hour we drove through the Scalp, one of the geological at- 

 tractions of the county of Dublin, and in half an hour more we entered 

 the demesne of Lord Powerscourt. It would be foreign from my pre- 

 sent purpose, even were I able, to tell of all the plants and insects that 

 were collected in the course of the day. Dr. Harvey and Mr. Bain col- 

 lected quantities of the pretty Hymenophylum Wilsoni. Dr. E. Percival 

 Wright, and others, captured fine specimens of Cossonm Twdii, &c. It is 

 to be wished that, on the occasion of this summer's excursions, the 

 Members would return to the Hon. Secretaries a list of the various 

 plants, &c, they may observe, and that then the Secretaries would form 

 these materials into what, I cannot doubt, would be a most interesting 

 paper. My own gatherings of Diatomacea? were the most productive 

 I have ever made; no less than sixty -six species figured by Smith 

 having been found. 



The following is a list of the species : — 



