204 



natural arrangemenb necessarily destroyed. This indeed turned out 

 to be the same CEdogonium exhibited in a recent condition by 

 Mr. Archer, first at the Club meeting, July, 1865, and which he 

 was still disposed to regard as most likely QSdo()onium setigerum 

 (Vaupell), though, as explained in the Minutes of date referred to, 

 the plant might possibly be CEdogonium apophysatum (Prings.). 

 Tlie present dried examples showed, sparingly, the "dwarf males" 

 with the "outer" antheridium, and the same series of mother-cells 

 of androspores and the same shaped oogonia. This species, Mr. 

 Archer thought, had not often presented itself; but the abundance 

 in which it occurred in the present instance might perhaps indicate 

 that it is not to be counted amongst the rarities. 



Mr. Archer exhibited fine and beautiful specimens of Vasicola 

 ciUata (Tatem, in ' Monthly Microscopical Journal,' No. Ill) new 

 to Ireland, and interesting as being the second discovery only of 

 this handsome infusorium. This, with its striking red " food-cor- 

 puscles," mingled with other colourless ones and vacuoles, its beau- 

 tiful hyaline and transversely corrugated vase and its active ciliary 

 motion, formed a remarkably pretty object. It must seemingly be 

 accounted rare too, for though a comparatively conspicuous form, it 

 is only the other day since its discovery by Tatem, nor does it appear 

 to have been recorded elsewhere. The present gathering, made near 

 Lake Belvidere, close to Mulliugar, presented examples in the various 

 conditions figured by Tatem, some in situ in their cases, some under- 

 going division, and some freely swimming. Tatem's figures place 

 the identity of this fine species beyond all doubt, though they seem 

 to give rather too much prominence to the red granules, to the 

 exclusion of the numerous more minute colourless ones which like- 

 wise pervade the body-mass, nor does he draw attention to the gene- 

 rally sufficiently striking feature presented by the marked pair of 

 contractile vacuoles in the broad neck-like portion ; nor, further, does 

 he depict the surface of the body as faintly striate, after the manner 

 of a Stentor. The outer marginal wreath of large anterior cilia 

 appear to be comparatively rigid, whilst those within and on the 

 aides are in constant wavy motion. This species sometimes takes in 

 large objects as food, occasionally even longer than the body, such 

 as a Pinnularia, which projects above and below, and bounded at each 

 end seemingly by only the integument of the animal. 



Dr. E. Perceval AV^right exhibited and described a remarkable 

 sponge from Greenland, for which he was indebted to the kindness 

 of Mr. Edward "Whymper. It belonged apparently to a genus near 

 Tethya. It was apparently free, of the shape of the half of a 

 small apple ; the under surface was fiat, the upper convex, and 

 furnished with five to six star-like oscula. The investing sarcode 

 layer was very thin, and the whole structure in external appearance 

 much resembled the Alcgoniiim mamillatam of 0. F. MilUer. No 

 such form was alluded to in Oscar Schmidt's ' List of Greenland 

 Sponges.' A full description, accon^pained by figures of the sponge, 

 will be given in a future number of this Journal. 



Dr. Moss, K.N., exhibited some varieties of Ceralium tripos, col- 



