EXPLANATION OF PLATES. 357 



TAB. XI. 



Figs. 1, 2. Moina rectirostris, male and female. 



1 a. Autennule of male 



3. Daphnia pulex ; var. mayna, female. 



4, 5. Male of do. 



Fig. 4 represents the male in a very young state, previous to its 



final moulting, and before it assumes its perfect form. 

 5 a. Antennule of male. 



TAB. XII. 



Fig. 1. Daphnia reticulata, male. 



a. Antennule. b. One of the first pair of feet. 



2. D. reticulata ; var. quadrangula. 



3. Sida cri/stallina, female. 



Fig. A. Head magnified, in profile, b. Antennule c. Eye. 

 e. Stomach, f. Mandible, g. Labrum. q. Organs by 

 which the animal attaches itself to objects, r. Heart. 



Fig. B. Eye magnified, to show the disposition of the crystallines 

 or facets. 



4. Sida cri/stattina, young. 



TAB. XIII. 

 Fig. 1. Sida crystallina. 



a. Antennule. b. Large antenna or ram us. c. Mandible. </. One 

 of the first pair of feet, e, f. Fourth pair of feet. tj. Sixth 

 pair of feet. h. Abdomen. 



TAB. XIV. 



Fig. 1. Daphnella Winyii, female. 



3. Do. supine. 



4. Head of do. highly magnified. 



a. Stomach, b. Antennule. c. Eye. f. Mandible, y. Labruiu. 

 /. Heart, o. (Esophagus. 



'2. D. iringii, male. 



a. Autennule. b. Abdomen. 



