Monas. 



99 



destitute of ternary envelope, and he places it among the 

 Nudo-flagellata. 



128. M. Warmingii, Cohn. 



Cells cylindrical, rounded at the ends, 

 pinkish, with the granules accumulated at 

 the extremities; 15 /a long, 5-6 /* broad 

 -(according to Warming), 8 /a (Cohn), with 

 a flagellum. Movements rapid, but irregu- 

 lar. (Fig. 83.) 



In brackish water. 



Fig. 83. — Monas 

 IVartningii, X 660 

 (after Warming). 



129. M. erubescens, Ehrenberg'(/.f., p. ii), 

 Warming considers this identical with 

 M. Warmingii, differing only in having the 

 granules equally distributed; 14 /* long, 

 6-7 fi. broad. 



In brackish water. 



130. M. gracilis, Warming {Lc, p. 6 

 of the Resum^). 



Cells straight, cylindrical, slender, 

 rounded at the ends, pinkish.; 60 /* long 

 •or less, 2 fx. broad ; paler than M. Okenii, 

 with few sulphur granules. Movements 

 slow; sometimes slightly curved. (Fig. 84.) 



In fresh water. 



Fig. S^.— Manas gTo- 

 cilis, X 660 (after 

 Warming). 



131. M. Mtilleri, Warming {I.e., p. 18 of the Resum^). 

 Volvox pundum, Miiller. 



Cells spherical or oval, 5 ■6-1 5 ^ long, having usually 

 ■one extreniity filled with angular and very refringent 

 granules, the other empty and hyaline. Granules whitish. 



