124 
FltOCEEDIXGS OF SOCIETIES. 
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 Cossonus Tardii, &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 Diatomacese 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 : — 
Amphora ovalis. 
,, minutissima. 
Amphipleura pellucida. 
Achnanthidium microcephalum. 
,, lanceolatum. 
Cocconeis pediculus. 
Cyclotella Kutzingiana. 
Campylodiscus costatus. 
,, spiralis. 
Cocconema lanceolatum. 
,, cymbiforme. 
,, parvum. 
Cymatopleura elliptica. 
,, apiculata. 
„ solea. 
Denticula tenuis. 
Diatoma vulgare. 
Epithemia granulata. 
„ gibba. 
,, turgida. 
,, rupestris. 
Eragillaria capucina. 
Gonphonema dichotomum. 
,, acuminatum. 
,, intricatum. 
Himantidium pectinate. 
,, gracile. 
,, undulatum. 
,, soleirolii. 
Melosira varians. 
Meridion circulare. 
Havicula ovalis. 
,, crassinervia. 
JSTavicula gibberula. 
,, dicephala. 
„ tumida. 
„ rhomboides. 
,, producta. 
Mtzchia sigmoidea. 
,, tenuis. 
,, linearis. 
,, minutissima. 
Odontidium mesodon. 
,, tebullaria. 
„ parasiticum. 
Pleurosigma attenuatum. 
Pinnularia viridis. 
„ major. 
,, mesolepta. 
,, radiosa. 
,, oblonga. 
,, tabellaria. 
Surirella ovalis. 
,, splendida. 
,, pinnata. 
,, biseriata. 
„ angusta. 
,, minuta. 
Synedra radians. 
,, lunaris. 
Stauroneis gracilis. 
,, phenicenteron. 
,, anceps. 
,, linearis. 
Tabellaria floculosa. 
,, fenestrata. 
