64 BRITISH PEESHWATER EHIZOPODA. 



Evglypha dentaia 



MONIBZ in Rev. Biol, nord France, I (1888), p. 86. 

 Sphenoderia dentata 



Penaed in Mem. Soo. Geneve, XXXI, 1, ii (1890), p. 185, pi. x, fi. 

 41-50; in Jahrb. nassau. Ver. Naturk. XLIII (1890), p. 72; in 

 Arcli. Sci. nat. (3) XXVI (1891), p. 149 ; in Amer. Natur. XXV 

 (1891), pp. 1071, 1081; Panne Rhiz. Leman (1902), pp. 523-525, 

 3 figs. ; in Proc. R. Soc. Ediiib. XXV (1905), p. 595 ; Sarcodines in 

 Oat. Invert. Suisse (1905), p. 108 ; in Brit. Antarct. Exped. I, 6 

 (1911), p. 221. 



PoBEL Le Leman, III (1904). p. 135. 



MuBBAT in Proc. Roy. Soc. Edinb. XXV (1905), p. 595 ; in Bathym. 

 Sm-v. Scott. Locba, I (1913), p. 326. 



AvEBiNTZEFF in Trudui S.-Peterb. Obhsch. XXXVI, ii (1906), p. 300. 



ScHOTJTBDBN in Ann. Biol, lacustre, I (1906), p. 369. 



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



Hbibtis in Zool. Anzeig. XXXIII (1908), p. 714 ; in Arcb. Hydrobiol. 

 V (1910), p. 110 ; in Rev. Suisse Zool. XIX (1911), p. 255. 



CocKEBELL in Univ. Colorado Stud, VI (1909), p. 306. 



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

 (1910), p. 501 ; in Ann. Scott. Nat. Hist. 1911, pp. 229, 230; pi. v, 

 ff. 12-15 ; in Naturalist, 1912, p. 181 ; in Scott. Natur. 1912, pp. 

 109, 113 ; 1913, pp. 208, 210, 232. 



HoPKiNSON in Trans. Herts Nat. Hist. Soo. XIV, 3 (1911), p. 232. 



Wailes & Penaed in Proc. R. Irish Acad. XXXI, lxv (1911), pp. 

 19, 52, 60. 



"Wailes in Scott. Natur. 1912, p. 61; in Trans. Liverp. Biol. Soc. 

 XXVI (1912), p. 20; in Jrn. Linn. Soc, Zool. XXXII (1912), pp. 

 126, 153 ; in Mun-ay's Nat. Hist. Bolivia and Peru (1913), pp. 32, 

 40 ; in Naturalist, 1913, p. 148. 



' Test oviform, hyaline, not compressed ; composed 

 of circular or oval silicious scales regularly imbricated, 

 arranged in alternating diagonal rows ; aperture 

 circular, terminal, bordered by a dentate cliitinous 

 fringe ; nucleus large, containing one or more nucleoles, 

 placed posteriorly ; plasma colourless, more or less 

 granular, partly filling the test ; one or two contrac- 

 tile vesicles usually present; pseudopodia attenuate, 

 simple, radiating, not numerous. 



Length 35-61 /«,; diameter 20-33 ju,; aperture 8- 

 13/a; nucleus 10-16jL(,in diameter; circular scales 5-9ju, 

 in diameter; oval scales 9-13 /a in length and 6-10 ju, 

 in breadth. 



Habitat. — Mosses and sphagnum. 



Sphenoderia dentata is generally distributed through- 

 out the British Isles and may be looked for wherever 

 moss is to be found. 



