Brown : Rhizopods frojii the Sheffield District. 93 



the form of ' mouth ' and ' lips.' Occasional in sphagnum. 

 Size 118 II. 



17. — Helcopera petricola Leidy (' Fresh vv. Rhiz. K. Amer.', 

 ]■). 165). Many in a stream entering the Quaker Insh Pond, 

 i\Ionsal Dale. 



18. — Arcella'arenaria Greeff (' Arch. f. mikr. Anat %■ Bd. II., 

 1866, p. 299; —A. microstoma Penard, in ' Faune rhizop.,' 

 p. 406). Common in mosses of woods and walls. 



19. — Phryganella hemisphaerica Penard (' Mem. Soc.', etc., 

 1890; 'Faune rhizop.', p. 421). Very common in mosses 

 of woods, walls, etc. Most tests are found empt^^ It is often 

 confused with Difflugia glohiilosa. :^ 



20. — Eiiglypha cristata Leidy. (' Freshw. Rhiz. N. An^f^ 

 Y>. 218 ; Penard ' F'aune rhizop.', p. 511). A small form an^ 

 only occasionally met with. Amongst sphagnum, Stanage, 

 and in a stream entering the Quaker Fish Pond. Monsal Daire. 

 Found also in Easedale Tarn. Size 40-45 }i. Rare. 



21. — Euglypha hrachiata Leidy (' Freshw. Rhizop. N. Amigr.', 

 p. 200 ; Penard, ' Faune rhizop.', p. 504). A very rare species, 

 Found once only in a stream entering the Derwent near Froggatt 

 Size 64 jj.. 



22. — Sphenoderia dentata Penard (' Mem. Soc.', etc., 1890 ; 

 ' Faune rhizop.', p. 523). Differs from all other Sphenoderia 

 in the dentate form of the mouth. Not a common species. 

 In mossy growth on watertrough, Ecclesall ; in a stream 

 entering the Quaker Fish Pond, Monsal Dale. Size 45 /x. 



23. — Sphenoderia fissirostris Penard (' Mem. Soc.', etc., 

 1890, p. 184 ; ' Faune rhizop.', p. 523). A rare species. Found 

 once only in sphagnum, Stanage. Size 40 p-. 



24. — Assulina niuscorum Greeff (' Sitz-Ber. d. Ges. z. 

 Beford, d. ges. Nacur. Marburg, 1888 ; Penard ' Faune rhizop.' 

 p. 519). Occurred in large numbers amongst moss from a field, 

 Ecclesall. Size 36 /x. 



25. — Trinema lineare Penarci ('Mem. Soc.'. etc., 1890; 

 ' Faune rhizop.', p. 529). A small and widely distributed 

 species, amongst moss and sphagnum. 



26. — Corythion dnbitim Taranek (' Monogr. der Xebeliden, 

 Bohmens,' p. 43). Another widely distributed form, though 

 not often recorded in this country. Amongst sphagnum, 

 Stanage, etc. ; in moss, Ecclesall, etc. ; amongst lichens, 

 Wyming Brook. Size 36 /x. 



27. — Pamphagus hyalinus Leidy (' Freshw. Rhizop. X. 

 Amer.', p. 194). Many individuals in sediment of pool, 

 Ringinglow, also in mossy growth on water trough, Ecclesall. 



igio Feb. i. 



