BY G. I. PLAYFAIR. 143 



Difflugia glohulosa, D. lobostoma, Sphenoderia lenta, and Tri- 

 nema enchelys were also observed. The most common species, 

 however, was Centropyxis aculeata, generally var. ecornis. 



EuGLYPHA ALVEOLATA var. HAMULIFERA, n.var. (PL viii,, f.l3). 



Forma laminis circulari-hexagonis minime inarginibus transili- 

 entibus ornata. 



Long. 44, lat 24, oris 8 /x. 

 Lismore(13). Plentiful. 



Var. L^vis (Perty) milii. (PI. viii., f.l4). 



Forma minuta, parte posteriore rotundata vel acuminata; ore 

 dentibus truncato-conicis 6 (visis: 4) circumcincto; membranji 

 glabra sine notis spinisque. 



Long. 30-34, lat. 16, or. 8-10 /x. 



Lismore (1, 6). Plentiful 



Arcella papyracea, n.sp. (PI. viii., f.l5). 



Lorica a fronte visa circularis; ore circulari, serie unica punc- 

 torum circumcinxo ; a latere crateriformis, margine levi, ore 

 recesso. Membrana glabra sine notis, textura papyracea, dilute 

 luteo-fusca. 



Diam. 60-80, crass. 32; lat. oris. 20-30 {x. 



Casino (14). 



The membrane is without the usual markings, semitransparent, 

 and cloudy like thin straw-paper. Arcella vulgaris and A. dis- 

 coides were also present, the latter very common. 



AcTiNOPHRYS SOL var. SIMPLEX (Schaudimi) mihi. 



Diam. corp. 7-22, pseudopodia long, ad 25 [x. 



Lismore (7, 12). 



Syn , Acanthocystis simplex Fr. Schaudinn, Mem. Acad. St. 

 Petersbourg, 1893, p.ll, f.8; (diam. 15-22 /x). The figure given 

 by Schaudinn shows quite plainly the characteristic lumpy^ 

 sharp-pointed pseudopodia of Actinophrys and Actinosphcerium. 

 The pseudopodia of Acanthocystis are of quite a different kind, 

 being smooth and bacillar, with or without a minute knob at the 

 end, or minutely bifid. In the specimens I noted, the pseudo- 



