64 C. F. ROUSSELET ON THE ROTIFERA OF DEVILS LAKE. 



Explanation of Plates 5 and 6. 



Plate 5. 



Fig. 1. Asplanchna Silvestrii Daday, characteristic female with 



double humps, dorsal view, x 50. 



2. A. Silvestrii, side view, x 50. 



3. A. Silvestrii, saccate form, dorsal view, x 50. 



4. A. Silvestrii, intermediate form, ventral view, x50. 



5. A. Silvestrii, male, side view, x 68. 



6. A. Silvestrii, male, dorsal view, x 68. 



7. A. Silvestrii, the jaws, x217. 



8. A. Silvestrii, vascular system with contractile vesicle, 



x 150. 

 9. A. Silvestrii, resting-egg, x 65. 



Plate 6. 



Fig. la. Braehionus pterodinoides sp. nov., dorsal view, x 196. 

 ,, lb. B. pterodinoides, ventral view, x 196. 

 lc. B. pterodinoides, side view, x 196. 

 2a. Braehionus satanicus Rousselet. Normal type, x 180. 

 2b. B. satanicus, small seasonal form (winter), dorsal view, 



X180. 

 2c. B. satanicus, small seasonal form (winter), ventral view, 



Xl80. 

 ,, 2d. B. satanicus, small seasonal form (winter), side view, 



X 180. 

 2e. B. satanicus, small seasonal form (winter), variation in 



posterior spines, x 200. 

 ,, 2f. B. satanicus, small seasonal form (winter), variation in 



posterior spines, x 200. 



Joum. Quekett Microscopical Club, Ser. 2, Vol. XII., No. 72, April 1913. 



