Explanation of Plates. 



223 



EXPLANATION OF PLATES. 



Pig. 1. 



2. 

 3. 

 4. 

 5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 



Fig. 



1. 

 2. 

 3. 



4. 

 5. 



6. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 



PLATE III. 



Didptomus sanguineus — terminal joints of male anten- 

 na x 163. 

 fifth feet of male x 163. 

 fifth foot of female x 163. 

 leptopus — fifth foot of female x 163. 



fifth feet of male x 163. 

 pallidus — fifth feet of male x 300. 



fifth foot of female x 300. 

 sicilis — fifth feet of male x 163. 

 pallidus — abdomen of female x 300. 

 sicilis — fifth foot of female x 300. 

 ashlandi — fifth feet of male x 163. 



fifth foot of female x 163. 

 terminal joints of male antenna 

 x 300. 



PLATE IV. 



Diaptomus minutus — fifth feet of male x 163. 



fifth foot of female x 300. 

 terminal joints of male antenna 

 x 300. 

 oregonensis — fifth feet of male x 163. 



fifth foot of female x 300. 

 Epischura lacustris — abdomen of male x 92. 

 Limnocalanus macrurus — abdomen of male x 40. 

 Cyclops americanus — abdomen of female x 58. 



fourth feet x 163. 

 fifth foot x 300. 

 brevispinosus — furca x 163. 



fourth foot x 163. 

 navus — abdomen of female x 68. 

 fourth foot x 163. 

 fifth foot x 300. 



