194 PROCEEDINGS OF SOCIETIES. 



acuminate processes at the apex of each segment, which are not 

 shown by Bailey, but as those do not project beyond the 

 seemingly truncate end of the cell, he may have overlooked them. 

 If indeed this be not correctly referable to Docidium nodosum 

 (Bailey), (Mr. Archer need hardly remind that this is not to be 

 confounded with Docidium nodiilosum, Breb., a fine but not un- 

 common species), then indeed it must be a new species, so far as 

 he was aware. But inasmuch as we have no better authority 

 than Bailey's meagre record and rough figure, nor are we likely 

 to obtain any recent specimens from his original localities, it is 

 safer to allow the question so to remain — the form now shown 

 can, ad interim, remain our Irish Docidium nodosum — of course 

 some might prefer to designate it Pleurotcenium nodosum. 

 Doubtless, there must be more to be had where this solitary 

 example came from, and a search in the same situation may be 

 more successful in obtaining a better gathering on a future 

 occasion. An enumeration of the Desmidian rarities taken on 

 the present visit thither Mr. Archer must defer until the material 

 at command was more fully worked up, and if not the veritable 

 examples in their own fresh beauty, he hoped to be able to 

 present one or two drawings to the Club at the subsequent meeting. 



Mr. Arthur Andrews exhibited Pohjplicmus pcdiculus (Linn) 

 Straus ; he had found this peculiar Eutomostracan in several of the 

 Conuemara lakes on the same recent excursion thither. On one 

 occasion, when " fisliing" with a small muslin net in Lough Corrib, 

 some hundreds of these creatures were taken in a single dip in a 

 sheltered sunny creek, whilst further search along the same shore 

 failed in procuring a single specimen. He also showed a drawing 

 of the young as they escaped from the ova, in which the develop- 

 ment of the eye with its muscular apparatus was very remarkable. 

 Mr. Andrews also showed Lynceus eJonffutus, Sida crystalJina, and 

 DajjJima mueronata, from tlie same localities. Acantholebris 

 curi'irostris was ver}'^ plentiful in most of the small bog-pools. 



Mr. Archer thought it might be interesting to mention that 

 several of the rarer Hhizopoda had turned up from the Conne- 

 mara gatherings, but always very scantily ; indeed, even the 

 'commoner forms were not at all abundant. To enumerate the 

 rarest in the order of the scarcity of their occurrence in the 

 gatherings hitherto, Diaplioropodon mobile (Arch.) might probably 

 come first. Of this form just one example only had as yet 

 presented itself; this was a remarkably fine one, and, when 

 living, its very copious and arborescent tuft of pseudopodia 

 strongly projected, it formed, of its kind, a noble object. This 

 specimen Mr. Archer had treated with carmine fluid and brought it 

 down to the meeting ; its large "nucleus," which indeed by some 

 might be doubted to be there when seen living, had acquired a 

 very bright colour, and thus formed a striking feature, whilst the 

 seeming incoherent and indiscriminate agglomeration of external 

 granules could be readily examined. Even though for so far so 

 scantily presenting itself, it was then interesting to extend the 



