ENTOMOSTUA< \. 



])i;il eggs ; and have found, from repeated experiments, 

 that those Daphniae which had ephippia became loaded 

 with eggs soon after they had thrown off these organs, 

 and had progeny again, without the intervention of males ; 

 and that the young so born from these Daplmia-, which 

 had tin-own oil' their ephippia and become pregnant, were 

 also independent of the access of the male, and became 

 mothers in the same manner as the young of oth'T 

 Daphniae. 



November 29th, I isolated a I), pnlr.r with an ephip- 

 ])inm ; 30th, ephippinm is thrown on"; December 4th, 

 Daphnia has eggs ; 8th, young ones are born ; Uth, the 

 mother, having been removed from the young imme- 

 diately after their birth, was found to ha\e eggs again : 

 1 (ith. young ones born ; 20th, lias eggs again ; .0 Ith, young 

 ones born; 25th, has eggs again; .January (ith, young 

 born mother has esrcrs in ovarv again ; Mth, vounu: born 



" - o * 



mother again has eggs ; 22d, young born ; February 1 st , 

 has eggs again ; 8th, young born. 



On the N!I December isolated one of the young born 

 from the subject of last series of observations on the 30th 

 November. On the 21st Decembei she was found to 

 Ii;i\e e..-gs ; 28th, young born; 2!)th, has again eggs; 

 January ( .)th, young born mother has eggs again ; 2 1th, 

 young born ; 25th, has eggs again ; I'Ybruary 1st. young 

 horn mother has eggs again; 9th, young born ; J'/th. 

 has eggs again ; .March s th, young born. 



In both of these experiments the young were always 

 removed from the vessel in which the mother was kept as 

 soon as born. 



On the 2d November I placed several ephippia in a 

 glass of clear water. On the Kith two young l)aphni;e 

 were born -isolated one of them; December 12th, this 

 Daphnia has given birth to several young, and has eggs 

 again ; 1 s th, has again gi\en birth to several young ; 1 Dili, 

 has eggs again ; 2 I th, \oimg born ; 25lh, has again eggs : 

 Januan (ith, young born ; 25th, alter two several moult - 



