360 
EXPLANATION OF PLATES. 
Tab. XXI. 
Fig. 1. Cythere inopinata. 
a. Ventral view. b. Superior antenna, c. Inferior do. 
pair of legs. e. Last pair of do. 
d. First 
2. C. quadridentata. 
3. C. convex a. 
4, 4 a. C . nigrescens . 
5, 5 a. C. acuta. 
6, 6 a. C. angustata. 
7. C. pellucida. 
Fig. 8. C. aurantia. 
9. C. impressa. 
10, 1 0 a, 1 1 . C. varia- 
bilis. 
12, 12 a. C. jlavida. 
Tab. XXII. 
Fig. 1 . Cypridina Mac Andrei. 
a. Animal, with the shell removed, b. Natatory feet. c. Second 
pair of antennse. d, d. Second pair of jaws. e. First pair of 
antennse. f Oviferous foot. g. Abdomen. 
Tab. XXIII. 
Fig. ] . Cypridina Brenda. 
a. Eye. b. Natatory foot, c, c. Second pair of antennse. d. Second 
pair of jaws. e. First pair of antennse. /. Oviferous foot. 
g. Branchial plate of first pair of jaws. 
Tab. XXIV. 
Cyclops quadricornis. 
Fig. 1. Male. Fig. 6. Ovum. 
2. Female. 7. Young, just bom. 
3. Yar. a , elongatus. 8. Do. 8 days old. 
4. Var. b. 9. Do. 15 days old. 
5. Yar. c. 10. Do. 17 days old. 
a. Antennule. b. Mandible, c. First pair of foot-jaws, d, e. Se- 
cond pair of foot-jaws. ( d . Internal division, e. External 
do.) f First pair of thoracic feet. g. Fifth pair of feet ; 
fulcra, or “supports.” 
