LEOYTHIUM HYALINUM. ~ 107 



AvBRiNTZEFP in Trudui S.-Peterb. Obshcli. XXXTI, n (1906), pp. 



81, 266-267. 

 ScHOTJTBDBN in Ann. Biol, lacustre, I (1906), pp.361, 362. 

 Evans in Proc. R. Phys. Soc. Edinb. XYII (1907), table 1. 

 HooGENEA.iD in Tidjs. Nederl. Dierk. Ver. (2) X (1908), pp. 414-416, 



424. 

 Landacbb in Proc. Ohio Acad. lY (1908), p. 428. 

 Brown in Naturalist, 1910, p. 93; in Brit. Assoc. Handb. Sheffield 



(1910), p. 501. 

 HOPKINSON in Irish Natur. 1810, pp. 3, 4. 



Wailbs & Penabd in Proc. R. Irish Acad. XXXI, lxv (1911), p. 18. 

 Wailes in Scott. Natur. 1912, p. 60 ; in Trans. Livei-p. Biol. Soc. 



XXYI (1912), p. 20; in Jrn. Linn. Soc, Zool. XXXII (1912), p. 126 ; 



in Naturalist, 1913, p. 148. 

 Schmidt in Arch. Protist. XXIX (1913), p. 219. 

 Corycia stercorea 

 Ybjdovsky Thier. Org. Brunnenw. Prag (1882), pp. 37-38, pi. i, 



f . 21 a~d. 

 MONIEZ in Rev. biol. nord France, I (1888), pp. 85-86. 

 Kbmna in Mem. Soo. malac. Belg. XXXIX (1905), p. 96. 

 Platoun (Chlamydophrys) stercoreuin 



Lanbssan Traite Zool., Prot. (1882), pp. 65-66. 



Envelope supple, colourless, transparent, homo- 

 geneous ; usually spheroidal ; aperture circular with 

 a short neck subject to dilation or contraction ; 

 plasma clear, colourless, sparsely granular, containing 

 refringent granules; nucleus large, hyaline, usually 

 containing a central nucleole ; a single contractile 

 vesicle occasionally visible near the aperture; pseudo- 

 podia numerous, radiating, filose or flattened, some- 

 times branched. 



Diameter 30-45 ;u, ; small individuals, about 20 ju, in 

 diameter, are sometimes seen. 



Habitat. — Submerged sphagnum, moss, and aquatic 

 vegetation. Not uncommon. 



England. — Isle of Man; IST. and W. Yorkshire; 

 Carrington Moor, Cheshire {Gash) ; Bedfordshire ; 

 Buckinghamshire; Gloucestershire {West); Isle of 

 Wight; Cornwall. 



Wales. — Llyn Idwal {West) and Moel Siabod {Hopk. 

 coll.), Carnarvonshire. 



Scotland. — Shetlands; Hebrides! {West); Perthshire 

 {Gash) ; Skye {West) ; Midlothian {Gash). 



Ireland. — Clare Island, Mayo; Inishbofin, Galway; 



