AJfD THEIE CLASSIFICATION. 109 



possibly quite accidental, is deserving of notice. The following 

 species were observed fi-om the Outer Hebrides : — 



From Lewis : — Nuclearia conspicua, Amceba protei(^, Cochlio- 

 podiuin bilimbosum, ArcelJa vulyaris and var. gibbosa, Centropyxis 

 acideata, Difflugia constrieta, D. pyriformis, D. acuminata, D. Solo- 

 ivetzTcii, D. corona, D. globidosa, Nehela collaris, N. JlabeUulum, 

 N. carinata, Heleopera petricola, Quadrula symmetrica, Euglypha 

 alveolata, E. ciliata, Splienoderia lenta, Assulina seminidum, Trinema 

 encTielys, Cyphoderia ampidlacea. 



From Harris : — V ampyrella lateritia, Pelomyxa palustris. Amoeba 

 verrucosa, DactylosplicBrium radiosum, CocMiopodium bilimbosum, 

 Arcdla vidgaris, A. discoides, Gentropyxis acideata, Dijffiagia 

 pyriformis, D. globulosa, Nebela Jlabellulubm, Qu,adrula symmetrica, 

 Hyalospihenia pJatystoma, Euglypha alveolata, E. ciliata, E. crislata, 

 Trinema enchelys, Pampliagus liyalinus. 



From North TJist : — DactylospTicerium radiosum, Arcella vulgaris, 

 Centrop>yxis aculeata, Bijflugia p)yriformis, D. acuminata, E. globu- 

 losa, Nabela collaris, Trinema enchelys, Euglypha ciliata, Quadrula 

 symmetrica. 



From South Hist: — Amceba verrucosa, DactylospJicerium radiosum, 

 Arcella vidgaris and var. gibbosa, Ceutropyxis aculeata, Difflngia 

 constrieta, D. pyriforr)iis, D. acuminata, Nebela collaris, Euglypha 

 ciliata, Sphenoderia lenta, Trinema enchelys. 



From Benbecula : — Amoeba proteus, Arcella vidgaris, Diff,ugia 

 globulosa, D. pyriformis, Euglypha alveolata, E. ciliata, Trinema 

 enchelys. 



The two following species were collected on St. Mary's, Scilly 

 Islands, and add to the distribution of British Ehizopods : — 

 Amoeba verrucosa and Difjlugia globidosa. 



The systematic position of Vampiyrella and allied genera lias 

 long been a matter of considerable doubt. It seems clear that 

 the two genera Vampyrella and Nuclearia are very closely allied, 

 on account of their structure and the nature of their pseudo- 

 podia, even though the la,tter genua does not possess the curious 

 red pigment found in the protoplasm of Vampyrella. It seems 

 equally clear that they can hardly be retained in Lankester's 

 ' Proteomyxa,' a group instituted to include a number of genera 

 concerning which more information was required. The long 

 pseudopodia of Vampyrella are straight, often radiating, and 

 always considerably attenuated towards a fine apex ; they are 

 frequently branched, and the branching takes place almost 



