LECYTHIUM HTALINUM. 107 



AVERINTZEFF in Trudui S.-Peterb. Obshch. XXXVI, n (1906), pp. 



81, 266-267. 



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

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

 HOOGENRAAD in Tidjs. Nederl. Dierk. Yev. (2) X (1908), pp. 414-415, 



424. 



LANDACRE in Proc. Ohio Acad. IY (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. 



WAILES & PENARD in Proc. R. Irish Acad. XXXI, LXV (1911), p. 18. 

 WAILES in Scott. Natur. 1912, p. 60; in Trans. Liverp. 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. 

 Cory da stercorea 

 YEJDOVSKY 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. 

 KEMNA in Mem. Soc. malac. Belg. XXXIX (1905), p. 96. 

 Platoun (Chlamydophrys) stercoreum 

 LANESSAN 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 /x ; small individuals, about 20 /a in 

 diameter, are sometimes seen. 



Habitat. Submerged sphagnum, moss, and aquatic 

 vegetation. Not uncommon. 



ENGLAND. Isle of Man; N. and W. Yorkshire; 

 Carrington Moor, Cheshire (Cash) ; Bedfordshire ; 

 Buckinghamshire; Gloucestershire (West); Isle of 

 Wight; Cornwall. 



WALES. Llyn Idwal (West) and Moel Siabod (Hopk. 

 coll.), Carnarvonshire. 



SCOTLAND. Shetlands; Hebrides! (West); Perthshire 

 (Cash); Skye (West) ; Midlothian (Cash). 



IRELAND. Clare Island, Mayo; Inishbofin, Galway; 



