32 BRITISH FRESHWATER RHIZOPODA. 



Test small, oviform, moderately compressed, glab- 

 rous ; aperture circular, bordered by eight pointed 

 scales ; body- scales oval, about twice as long as broad, 

 slightly imbricated ; plasma and pseudopodia normal ; 

 nucleus containing a single nucleole. 



Length 22-52 /A; breadth 0'5 to 07 of the length; 

 thickness 0'6 to O7 of the breadth; aperture 6-1 2 /u, 

 in diameter; body-scales 5-8 /x in length, 2*5 to 4 p 

 in breadth ; nucleus 8-10 /x, in diameter. 



Habitat. Mosses in damp and wet situations. 



ENGLAND. Isle of Man ; Yorkshire ; Shropshire ; 

 Bedfordshire ; Cambridgeshire ; Hertfordshire ; Buck- 

 inghamshire ; Oxfordshire ; New Forest, Hampshire ; 

 Isle of Wight; Somersetshire; Devonshire; Cornwall. 



FIG. 121. Forms of aperture-scales of Euglypha rotunda. x 1000. 



SCOTLAND. Shetlands; Outer Hebrides; Inverness- 

 shire, Perthshire, and Argyllshire (Brown) ; Skye, 

 Inner Hebrides ; Dumfriesshire. 



IRKLAND. - - Donegal ; Armagh ; Mayo ; Gal way ; 

 Limerick; Kerry. 



11. Euglypha laevis (Ehrenberg) Perty. 



(Plate XXXIV, figs. 10-12; PL XXXIX, figs. 5-7; 



and figs. 118 and 122 in text.) 



Difflugia laevis 



EHRENBERG in Ber. Akad. Berlin, 1845, p. 307 ; Microgeol. (1856), 

 pp. 12, 33; in Abh. Akad. Berlin, 1871 (1872), pp. 253-254, pi. iii, i, f. 5. 

 Euglypha lievis 



PERTY in Mittli. nat. Ges. Bern, 1849, pp. 163, 164, 168 ; Kenntn. 

 kleinst. Lebensf. (1852;, p. 187, pi. viii, f. 18. 



PARONA in Boll. Scient. II (1880), p. 24. 



MAGGI in Bend. R. 1st. Lomb. (2) XXI (1888), p. 301. 



PENARD in Mem. Soc. Geneve, XXXI, 1, 11 (1890), p. 181, pi. ix, ff. 93- 

 96 ; in Amer. Natur. XXV (1891), p. 1071; in Jahrb. nassan. Yer. 

 Naturk. XLIII (1891), p. 71; in Rev. Suisse Zool. YII (1899), I, 

 p. 110 ; op. cit. IX (1901), p. 237 ; Faune Rhiz. Leman (1902), pp. 

 512-513, 2 figs. ; in Arch. Protist. II (1903), p. 269; op. cit. IX 

 (1909), p. 265 ; in Brit. Antarct. Exped. I (1911), pp. 204, 207, 220, 

 236 ; in Deux, exped. antarct. frans. (1911), pp. 4, 10. 



