PROCEEDINGS OF SOCIETIES, 



Dublin Microscopical Club, 

 imii July, 187G. 



Fructification of Preissia commutata, exhihitecl. — Dr. Moore 

 sliowed a preparation of the fructification of Preissia commutata. 



On Stauroneis phyllodes (Ehrenb.), Kiitz., Rabeuh. — Rev. E. 

 O'Meara exhibited a form of Stauroneis in external aspect 

 strongly resembling that figured by Kiitzing and Eabenhorst as 

 Stauroneis phyllodes, and by those writers attributed to Ehrenberg, 

 No feature of the species except the external outline is noted 

 by those authors, and if the form under consideration be identical, 

 therewith, as Mr. O'Meara seemed inclined to think, the follow- 

 ing particulars are to be superadded to the vague description : 

 Transverse stride fine, slightly radiate, easily resolvable into 

 moniliform dots. The only habitat assigned by Kiitzing and 

 Eabenhorst to this species is South America ; Ealfs, in ' Pritchard's 

 Infusoria,' mentions China as the only other place in which it 

 had been found. It is, therefore, interesting to find it occur in 

 Ireland, the only locality (as yet) being Lough Mask, near Tour- 

 makeady, Co. Mayo. 



Cosmarium cyclicum, Lundell, also Cosm. tetragonum, ^^Q.,form 

 {so-called by), Lundell, exhibited. — Mr. Crowe showed Cosmarium 

 cyclicum, Lundell, or rather, more probably, that form of it 

 recorded by Reinsch ; the present examples were taken by Mr. 

 Crowe on the occasion of a tour, along with Mr. Archer, iu Scot- 

 land. This is an extremely rare species in Ireland ; it has occurred 

 as yet once at " Callery Bog," once at " Rocky Valley," both 

 near Bray, and some half dozen specimens at " Toole's Rocks,'* 

 Co. Wicklow. 



Mr. Archer showed also Lundell's so-called form of Cosm. 

 tetragonum. Nag., taUen also in Scotland on the same occasion. 

 This, too, is an extremely rare species in Ireland, occurriug as 

 yet extremely sparsely at that very restricted, but from time to 

 time by no means poor, little locality in the " Rocky Valley ;" 

 also at " Toole's Rocks," and once in Connemara. The Irish aud 

 the Scottish examples accord in every respect and detail abso- 

 lutely, and they are, doubtless, identical with Luudell's species ; 

 but, although Mr. Archer did not know Nageli's form, ours did 

 not accord therewitli, at least by any means in the way that the 

 Irish and Scottish examples did with each other and with Lun- 



