358 
EXPLANATION OE PLATES. 
Tab. XY. 
Fig. 1. Eurycercus lamellatus. 
a. Superior antenna, b. Inferior do. c. Mandible, d. Labrum. 
d*. Jaws. e. First pair of feet, f Second do. g. Third 
do. h. Fourth do. i. Fifth do. k. Abdomen. 1. Eye. 
2. Macrothrix laticornis , female. 
a . Inferior antenna. 
3. Bosmina longirostris . 
a. Inferior antenna. 
Tab. XYI. 
Fig. 1. Peracantha truncata. 
a. Inferior antenna, b. Intestine. 
2. Alona ovata. Fig. 3. Alona reticulata. 
4. Alona quadrangular is. 
a. Labrum. b. Abdomen. 
5. Acroperus har pa. Fig. 6. Acroperus nanus . 
7. Chydorus globosus. 
a. Jaws. b. Inferior antenna, c. Abdomen. 
8. Chydorus splicer icus. 
9. Camptocercus macrourus. 
a. Abdomen. 
Tab. XYII. 
Fig. 1. Polyphemus pediculus. 
a. Inferior antenna, b. One of the first pair of legs. 
2. Evadne Nordmanni. 
a. Yiew of the legs (from Loven), 
3. Pleuroxus trigonellus. 
a. Antennule. b. First pair of feet. c. Abdomen. 
4. P. uncinatus. Fig. 5. P . hamatus. 
Fig. a. Convoluted intestine of 'Eurycercus lamellatus. 
Fig. b. Do. of Chydorus globosus. 
a. (Esophagus, b, c } d. Convolutions. /. Anus. 
