154 C. F. ROUSSELET ON BRACHIONUS SERICUS, ETC. 



embryo ; the stout eggshell is finely granular and pitted with 

 shallow depressions. 



The measurements of this species show the following dimen- 

 sions : lorica, 279 /x (/ r in.) ; male, fully extended, 136 jx ( T -|-g-in.) ; 

 female egg, 122 tt (^JL^in.); male egg, 85 /x (^J^ in.); resting 

 egg, 163 /* (rh in.). 



Explanation of Plates. 



Plate 11. 



Fig. 1. Brachionus sericus, normal type, side view, x 160. 

 J5 2. ,, ,, variety with pointed posterior pro- 



longation, dorsal view, x 160. 



3. ,, ,, variety with pointed posterior pro- 

 longation, side view, x 160. 



4. ,, „ male, x 390. 



„ 5. „ „ resting egg, x 200. 



Plate 12. 



Fig. 6. Brachionus quadratus, var. rotundus, x 180. 

 „ 7. „ „ „ „ male, x 375. 



„ 8. „ „ „ „ resting egg, x 240. 



,, 9. Brachionus rubens, Ehrenbg., outline of lorica, x 200. 

 „ 10. „ „ „ photo, x 136. 



„ 11. „ „ „ male, x 370. 



53 



3> 



Journ. Quekctt Microscopical Club, Scr. 2, Vol. X., No. 61, November 1907. 



