104 BRITISH FRESHWATER RHIZOPODA. 



approach to either of those species. The former has 

 not, in any of its variations, the tubular swollen neck 

 of N. lageniformis ; whilst N. barbata is very much 

 smaller, and has a neck, with parallel margins, con- 

 siderably narrower in proportion to its length. The 

 species though stated by Penard to be rare on the 

 continent is frequently met with in sub-alpine localities 

 in this country. 



4. Nebela militaris Penard. 

 (Plate XXV, figs. 15 and 16.) 



Hyalosphenia tincta LEIDY (pars) Freshw. Rhiz. N. Amer. 



(1879), p. 138, t. xx, f. 18 ; LANDACRE in Pr. Ohio Acad. 



Sci. IV, 10 (1908), p. 428. 

 Nebela collaris LEIDY (pars) Freshw. Rhiz. N. Amer. (1879), 



p. 147, xxiii, f. 7; G. S. WEST (pars) in Jrn. Linn. Soc., 



Zool. XXVIII (1901), p.^321. 

 Nebela bursella VEJDOVSKY (pars) Thier. Org. Briinn. Prag. 



(1882) t. ii, f. 2; TARANEK (pars) in Sitzber. bohm. Ges. 



Wiss. 1881 (1882), p. 230, f. 2; and in Abh. bohm. Ges. 



Wiss. (6) XI (1882), 8, p. 36, t. iii, ff. 7-14. 

 Nebela militaris PENARD in Mem. Soc. Geneve, XXXI (1890), 



2, p. 164, t. vii, ff. 16-22 ; and Faune Rhiz. Leman (1902), 



p. 368, ff. 1-4 (p. 369) ; AVERINTZEV in Trudui S.-Peterb. 



Obshch. XXXYI (1906), 2, p. 248; and in Zool. Anzeig. 



XXXI (1907), p. 310; SCHOUTEDEN in Ann. Biol. Lacustre, 



I, 3 (1906), pp. 354, 356; MURRAY in Ann. Scott, Nat. 



Hist. 1907, p. 95. 



Test small, ovoid in broad view, very transparent, 

 the crown semi-circular; the sides tapering into a 

 narrow neck; at the convex mouth slightly dilated, 

 the lips having a thickened border. In narrow lateral 

 view convex, tapering from the broadest diameter in 

 nearly straight lines sometimes slightly convex and 

 then concave downwards to the notched mouth. The 

 entire surface covered with plates of varying pattern, 

 mostly circular. Plasma colourless, always containing 

 a quantity of chlorophyllous particles, large and small, 

 mixed with oil-like globules and some granular matter, 

 but never very dense. Pseudopodia thin, blunt, four 



