102 



BRITISH VEESHWATEB BHIZOFODA. 



all apparently of siliceous substance. It rarely happens 

 that the plates are all circular, or all oval ; more fre- 

 quently they are mixed, Avithout order or proportion, 

 and their edges are well defined. 



Examples are occasionally met with which approxi- 

 mate on the one side to N. collaris and on the other to 

 N. flabellulimn, but an acquaintance with the varied 

 peculiarities of these species will usually dispel any 

 difficulty which may be felt in differentiating them. 



Individuals met with in places which are liable to 

 get dried up are generally poor and misshapen. 



91 



92 





■liJffSS^W 



Fig. 91. — Test oi Nehela tincta. Dunham, Cheshire, x 280. 

 Fig. 92. — " Difflugia proteiformis " Party : ? = test of Nehela tincta. 

 After Perty, loc. cit. x 300. 



3. Nebela lageniformis Penard. 

 (Plate XXV, figs. 12-14.) 



Nehehi sp. Leidy Freshw. Rhiz. N. Amer. (1879), p. 160, t. 



xxiv, ff. 18, 19. 

 Ni'hi'lft lageniformis Penaed in Mem. Soc. Geneve, XXXI 



(1890), 2, p. 158, t. vi, ff. 50-61 ; in Jahrb. nassau. Ver. 



Naturk. XLIII (1890), p. 71 ; Faune Rhiz. Leman (1902), 



]). 355, ff. 1-4 (p. 356) ; in Arch. Protist. 11 (1903), p. 



259; in Pr. R. Soc. Edinb. XXV (1905), 8, pp. 594, 596; 



and in Jrn. R. Micr. Soc. 1907, p. 278; Levandee in 



7\c'ta Soc. Fauna Fenn. XJI (1894), 2, p. 20 ; and op. cit. 



XX (1901), 8, p. 9 ; ScHAUDiNN in Deutscli-Ost-Africa, 



IV, 2 (1897), 3 9, p. 10; Ayeeintzev in Trudui S.-Peterb. 



Obshch. XXXVI (1906), 2, p. 24(i; and in Ann. Biol. 



Lacustre, II, 1 (1907), p. 166; Sciiouteden in Ann. Biol. 



