296 Pari III. — Ninth Annual Report 



Leptodobjce. 

 Leptodora, Lilljeborg (1861). 



Leptodora hycdina, Lilljeborg. 



1874. Leptodora hyalina, Weismann, Bau und Lebenser, von Leptodora 



hyalina. 

 1884. Leptodora hyalina, Herrick, loc. cit., p. 123, pi. N, figs. 6, 7. 



This is a large species ; some of my specimens from Loch Leven measure 

 nearly half an inch in length. Both branches of the antennas are four- 

 jointed ; the body is elongated, not curved as in Bythotreplies. It is con- 

 sidered to be a somewhat rare species, but it was not very rare in Loch 

 Leven. 



EXPLANATION TO PLATES. 



Plate V. 



Fig. 1. Monospilus tenuirostris, x 57 



Fig. 2. Scapliolebris mucronata, head with spine, . x 40 



Fig. 2a. ,, ,, head without spine, x 40 



Fig. 2 b. ,, ,, intermediate form of spine, x 40 



Fig. 2c. „ ,, post-abdomen, x 110 



Fig. 3. (1) Ceriodaphnia punctata, x 56 



Fig. 3a. „ ,, post-abdomen, x 132 

 Fig. 3b. ,, „ part of carapace, highly magni- 

 fied. 



Fig. 4. Daphnia jardini, x 40 



Fig. 4a. „ „ post-abdomen, x 50 









Plate VI. 









Fig. 5. 

 Fig. 5a. 

 Fig. 5b. 

 Fig. 6. 



Leydigia 



>) 



Alonella 



quadrangul 



>> 



nana, 



arts, 



antenna, 

 post-abdomen, 







x 52 

 xl50 

 x .87 

 xl65 



Fig. 7. 

 Fig. 7a. 



Candona 



5} 



ambigua, n. 



)3 



sp., 



seen from left side, 

 seen from above. 







x 65 

 x 65 



Fig. 7b. 



JJ 



J) 





antenna, 







xl65 



Fig. 7c. 



5> 



)} 





antennule, 







xl45 



Fig. 8. 



J) 



pubescens, 





seen from right side 



(for 



com- 





Fig. 8a. 



}> 



)> 





parison), 

 seen from above (for 

 son), 



compari- 



x 60 

 x 60 



