DIFFLUGIA OUBICULABIS. 39 



tlie neck truncated by the narrow circular mouth. 

 Protoplasm colourless, containing one or more clear 

 vesicles, with minute chlorophyl-pallets throughout its 

 substance, and a single nucleus near the crown; the 

 pseudopodia slender, simple, three or four. 



Dimensions : Diameter 75-90 ,u ; length of neck 

 about 10 ,u ; diameter of mouth about 20 p. 



In bog-pools at Dunham, Cheshire, 1891. 



This pretty rhizopod, though minute and possessing 

 a naked chitinous test, must (at least provisionally) 

 find a place among the fiifflugise. Differing so much 

 in appearance from other members of the genus, it may 

 seem out of place, but it would be more so in any of the 

 genera which have purely chitinous tests. It may be 

 readily distinguished by the spherical, yellowish, homo- 

 geneous test, and the short neck, with its narrow oral 

 aperture. The organism was discovered in tufts of 

 wet moss, in the living state, together with numerous 

 empty tests, in a bog at Dunham, but it has not been 

 since met with there or elsewhere. 



16. Difflugia urceolata Carter. 

 (Plate XXI, figs. 10-12; and fig. 57 in text.) 



Difflugia urceolata CARTER in Ann. Nat. Hist. (3) XIII 

 (1864), pp. 27, 37, t. i, f. 7 ; PARFITT in Tr. Devon Assoc. 

 Ill (1869), p. 66; LEIDY (pars) in Pr. Acad. Philad. 1877 

 (1878), p. 307; and Freshw. Rhiz. N. Amer. (1879), p. 

 106, t. xiv, if. 1, 2, 5-7; xix, ff. 28, 29; BUTSCHLI in 

 Bronn's Thier-Reichs, I, 1 (1880), t. iii, f. 8; HITCHCOCK 

 Synops. Freshw. Rhiz. (1881), p. 13; VEJDOVSKYinSitzber. 

 bohm. Ges. Wiss. 1880 (1881), p. 138; TARANEK in 

 Sitzber. bohm. Ges. Wiss. 1881 (1882), p. 227 ; DE TARR 

 in Rep. N. York State Mus. XXXV (1884), p. 166; 

 BLANC in Bull. Soc. Vaudois (2), XX (1885), p. 288; in 

 Ann. Nat. Hist. (5) XV (1885), p. 427; in Arch. Sci. nat. 

 (3) XXVI (1891), p. 576; and Difflugies Lac Leman 

 (1892), p. 2, t. ii, ff. 1-5, 21, 22; DADAY in Ertez. math, 

 termesz. Akad. Budapest, III (1885), p. 161 ; in Termesz. 

 Fiizetek, XIV (1891), p. 110; op. cU. XV (1892), pp. 9, 



