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 ft long, 5-6 /* broad 

 (according to Warming), 8 /A (Cohn), with 

 a flagellum. Movements rapid, but irregu- 

 lar. (Fig. 83.) 



In brackish water. 



129. M. erubescens, Ehrenberg (I.e., p. n). 

 Warming considers this identical with 



M. Warmingii, differing only in having the 

 granules equally distributed; 14 //. long, 

 6-7 /A broad. 



In brackish water. 



130. M. gracilis, Warming (I.e., p. 6 



of the Resume"). 



Cells straight, cylindrical, slender, 

 rounded at the ends, pinkish; 60 p. long 

 or less, 2 //. broad ; paler than M. Okenii, 

 with few sulphur granules. Movements T ,. 



Fig. 84. Manas gra- 



slow ; sometimes slightly curved. (Fig. 84.) /, x 660 (after 

 In fresh water. Warming). 



131. M. Mulleri, Warming (I.e., p. 18 of the Resume'). 



Volvox punctum, Miiller. 



Cells spherical or oval, 5-6-15 fi long, having usually 

 one extremity filled with angular and very refringent 

 granules, the other empty and hyaline. Granules whitish, 



