44 



G. 0. SAKS. 



[No. 8. 



Explanation of the Plates. 



Pl. l. 



Fig. 1. Ephippium of Daphnia Lurnholtzii, picked out from the 

 dried mud, lateral aspect. X 43. 

 ,, 2. Same. from above. 



„ 3. Ephippium opened, and its two valves spread out on 

 either side; inner capsule likewise opened, to show the 

 two ova lying in situ within the left valve. X 62. 



„ 4. Inner capsule separated from ephippium; viewed from 

 right side. X 78. 



5. A small portion of this capsule, magnified 345 diameters. 



6. Ephippial ovum in which no embryonal development 

 has yet tåken place. X 78. 



„ 7. Another ovum, with embryo enclosed, ventral aspect. 

 X 78. 



„ 8. Same, viewed from right side. 



„ 9. Ephippial ovum, containing an almost fully developed 



embryo, lateral aspect. X 78. 

 ,, 10. Young of Daphnia Lumholtzii, recently hatched, viewed 



from right side. X 78. 

 ., 11. Ephippium of Daphnia? sp?, picked out from the dried 



mud. X 43. 

 „ 12. Ephippium of Simocephalus sp? X 62. 

 ,, 13. Do. of Ceriodaphnia cornuta. X 62. 

 „ 14. Do. of Moina propinqua. X 62. 



