100 BRITISH FRESHWATER RHIZOPODA. 



individuals were similarly malformed, and if such mal- 

 formation of Nebela collaris occurs in a deep lake in 

 Scotland as well as in a shallow pool in Devonshire. 

 Dr. Penard named the form dredged in Loch Ness 

 Nebela bipes (Carter) from a drawing by Mr. Murray, 

 and in a letter to the writer he says that in his opinion 

 it is a good species, and that, " physically speaking, it 

 would be rather difficult for a shell of Nebela collaris 

 to take that form of malformation."] 



2. Nebela tincta (Leidy) Averintzev. 



(Plate XXV, figs. 8-11 ; and figs. 90, 91, and ? 92 



in text.) 



Difflugia proteiformis Peety ? Kenntn. kleinst. Lebensf. 



(1852), p. 187, t. ix, f. 8. 

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



(1879), p. 138, t. XX, ff. 11-17; Hitchcock Synops. 



Freshw. Rhiz. (1881), p. 18 ; De Taer in Rep. N. York 



State Mus. XXXV (1884), p. 166; Cebtbs Prot. in Mission 



Scient. Cap. Horn, VI, 3 (1889), p. 20; Haevey in Amer. 



Natur. XXII (1888), p. 72; Loud in Tr. Manch. Micr. 



Soo. 1891 (1892), p. 55. 

 Nehela hursella Taeanek in Sitzber. bohtn. Ges. Wiss. 



1881 (1882), p. 230, f. 2 (p. 231) ; and in Abb. bohm. Ges. 



Wiss. (6) XI (1882), p. 36, t. iii, ff. 7-14; t. iv, f. 16; 



Penaed in Mem. Soo. Geneve, XXXI (1890), 2, p. 163, 



t. vii, ff. 6-11 ; in Jahrb. nassau. Ver. Naturk. XLIII 



(1890), p. 71 ; Fauna Rhiz. Leman (1902), p. 366, ff. 1-3; 



and in Pr. R. Soc. Edinb. XXV, 8 (1905), p. 594 ; Bloch- 



MANN Mikr. Thierw. Siisswass. (1886), p. 13, and ed. 2 



(1895), p. 17; Averintzev in Trudui S.-Peterb. 01)shch. 



XXX, 1 (1900), p. 240; and in Ber. Siisswass. nat. Ges. 



St. Petersb. I (1901), p. 215; Mueeay in Ann. Scott. 



Nat. Hist. 1907, p. 95. 

 Nebela tincta Avebintzev in Trudui S.-Peterb. Obshch. 



XXXVI (1906), 2, p. 249; Schouteden in Ann. Biol. 



Lacustre, I, 3 (1906), pp. 354, 356. 



Test oval or sub-rotund, sometimes approaching to 

 pyriform, much compressed, composed of transparent 

 yellowish chitinous membrane, with a surfacing of oval 



