NEBELA GALEATA. 115 



in dorsal -view, likewise, the edge presents a uniform 

 thickness ; in transverse section, therefore, — that is 

 with the crown directed towards the eye — the form is 

 that of a compressed ellipse, with a longitudinal band 

 down the centre, of which the extremities extend 

 slightly beyond the marginal limits. Plasma normal, 

 not filling the entire cavity of the test, attached to the 

 dome by threads of ectoplasm, and containing, besides 

 a conspicuous nucleus, normally situated, a consider- 

 able proportion of chlorophyllous and colourless 

 corpuscles of variable size. Pseudopodia freely pro- 

 duced, showing a tendency to bifurcate or become 

 branched. 



Dimensions: 180-200 ju,; breadth 100 /a. 



In Spliacjnum, Dunham, Cheshire. 



N. galeata is a robust species, possessing a test which 

 is very graceful in its symmetry, and beautiful as a 

 microscopic object. The thickened border is unmis- 

 takable, and appears prominently when the test is 

 examined on its lateral edge, terminating the sloping 

 crown with a distinct knob. The organism is very 

 active ; the pseudopodia appear incessantly in motion ; 

 and the test is very frequently seen erected, presenting 

 the elliptical crown with its thickened edge to the eye. 



1 ] . Nebela americana Taranek. 

 (Plate XXXI, figs. 15-18 ; and fig. 96 in text.) 



Nebela americana Taeanek (pars) in Sitzber. bohm. Ges. 

 Wiss. 1881 (1882), p. 231 ; and in Abb. bohm. Ges. Wiss. 

 (6) XI (1882), 8, p. 40, t. iii, ff. 1.5, 16; Penaed Faune 

 Rhiz. Leman (1902), p. 363, ff. 1-6; Aveeintzev in Trudui 

 S.-Peterb. Obshch. XXXVI (1906), 2, p. 252 ; Schou- 

 TEDEN in Ann. Biol. Lacustre, I, 3 (1906), pp. 354, 356. 



Nebela longicollis Penaed in Mem. See. Geneve, XXXI 

 (1890), 2, p. 158, t. vi, ff. 45-49; and in Amer. Natur. 

 XXV (1891), p. 1073. 



Test elongated, much narrower than that of N. 

 marginata, the lateral margins (as the test lies upon 



