360 EXPLANATION OF PLATES. 



Tab. XXL 



Tab. XXIT. 

 Fig. 1 . Cjjpridina Mac Andrei. 



(I. Animal, with the shell removed, h. Natatory feet. c. Second 

 pair of antenna;, d, d. Second pair of jaws. c. First pair of 

 antennae, f. Oviferous foot. g. Abdomen. 



Tab. XXIII. 



Fig. 1 . Cypridina Brenda. 



f/. Eye. ^. Natatory foot. c,6'. Second pair of antenna;, f/. Second 

 pair of jaws. e. First pair of antennfc. f. 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 born. 



3. Var. a, elongatus. 8. Do. 8 clays old. 



4. Var. h. 9. Do. 15 days old. 



5. Var. c. 10. Do. 17 days old. 



a. Antennule. h. Mandible, c. First pair of foot-jaws, d, e. Se- 

 cond pair of foot-jaws. {d. Intexnal division, e. External 

 do.) /. First pair of thoracic feet. g. Fifth pair of feet ; 

 fulcra, or "supports." 



