Brown : Freshwater Rhizopods. 



107 



Difflugia acuminata Ehrenb. Common in sediment. Test 

 often consists entirely of diatom frustules {^D. hacillarium 

 Perty. Ecclesall Woods. Frogi^att, etc. 



Difflugia globulosa Dujardin. Common. Ecclesall \\'oods, 

 Ringinglow, etc. 



Difflugia urceolata Carter. Not common. Sediment of 

 water-trough, Froggatt. 



Difflugia constricta (Ehrenb; Leidy. Common in pools. 



Lecquereusia spiralis f Ehrenb; Schlumb. A form with an 

 apparently coiled shell. Generally common. Stanage, Frog- 

 gatt, Ringinglow, Occasionally the test consists of angular 

 sand grains. (Ecclesall Woods;. 



Nebela collaris (Ehrenb; I^eidy. A common form in Sphag- 

 num. Froggatt, Ringinglow, etc. 



Nehela flahellulum Eeidy. Less common, but in similar 

 situations. Froggatt. 



Quadrula symmetrica Schultz. Common in pools. Frog- 

 gatt, Stanage, etc. 



Quadrula irregularis Archer. Amongst mossy growth on 

 water trough. Ecclesall. 



Cochlicjpodium hilimhosiirn (Auerb; Leidy. Occurs associated 

 with the last form at Ecclesall. 



Family Euglyphixa. 



Euglypha alveolata Dujardin. A common form and widely 

 distributed. Both spined and unspined forms occur in most 

 situations. 



Euglypha ciliata (Ehrenb; Leidy. Also common in sediment 

 and amongst aquatic plants. Ringinglow, Froggatt, Stanage. 



Assulina seminulum (Ehrenb;. A few empty tests amongst 

 Sphagnum. Ringinglow and Burbage. 



Cyphoderia ampulla (Ehrenbj Leidy. Common and widely 

 distributed in sediment and amongst vegetation in pools; 

 Ringinglow, Burbage, Ecclesall AA^jods, etc. 



Sphenoderia lenta Schlumfj. A few empty tests amongst 

 Sphagnum. Stanage. 



Trinema enchelys (Ehrenb; Leidy. One of the most widely 

 dispersed forms, very variable in size. 



Pamphagus mutahilis Bailey. ]\Iany associated together 

 amongst floating Alga. Burbage. A form with very delicate 

 flexible test. 



1909 March i. 



