6o 



THE SCOTTISH NATURALIST 



gatherings, but the lakes from which they were collected 

 were shallow and unsuited to that species. 



SPECIES. 



G.S. 



Pen 



enl 



Amphitrema flavum (Archer)^ Pen. 



stenostoma, Niisslin 

 vvrightianum, A rcher 

 Arcella artocrea, Leidy 

 catinus, Pen. . 

 discoides, Ehrenb. . 

 hemispherica, Perty 

 vulgaris, Ehrenb, . 



var. gibbosa (Pen.") 

 Assulina muscorum, Greeff 

 seminulum, Leidy 



var. scandinavica 

 Bullinula indica, Pen. 

 Campascus minutus, Pen. . 

 Centropyxis aculeata, Stein 



var. ecornis, Leidy 

 var. discoides, Ehr 

 arcelloides, Pen. 

 Cochliopodium bilimbosum (Azver.") y Leidy 

 Corythion dubium, Taranek 

 pulchellum, Pen. 

 Cryptodifflugia oviformis, Pen. , 

 sacculus, Pen. . 

 Cyphoderia ampulla (Ehrenb.), Leidy 



var. vitroea, Wattes 

 trochus, var. amphoralis, 

 Diaphoropodon mobile, Archer . 

 Difflugia acuminata, Ehrenb. 



var. inflata, Pen 

 arcula, Leidy 

 bacillariarum, Perty 



var. elegans (Pen.~), 

 baciliifera, Pen. . 

 brevicolla, Cash . 

 constricta, Leidy . 

 globulus, Ehrenb. 

 lucida, Pen. . 

 manicata, Pen. 

 oblonga, Ehrenb. . 



var. lacustris, Pen 

 oviformis, Cash 

 penardi, Hopk. 

 pristis, Pen. 

 pulex, Pen. . 

 subxqualis, Pen . 

 tuberculata, Archer 

 Euglypha alveolata, Duj. . 



armata, Wattes (10) . 

 ciliata, Ehrenb. . 



Wailes 



West 



Cash 



