*•-•*- ' 



to' 



jt 



'^^■e birth 



'1 the k ■""* 



r., °^ certain 

 ^losteri$,Di, 



"^^^^^ng almost 



^'^^^ birth to U 



a 



k^ 



°^ ^lere speakin 



()■ 



onlv 



concernin 



ff 



-rtainfbrhiinseli;i[i, 

 ^/t ^c? at the lime ic 



undergo 



"here their juxtapose 



i- 



^U 



rsque alveolar netmil 



of metamorplioai 



?s 



dso believes that i 

 J over the trans 

 nt their deve 



duction 



of plants; 



r 



ather am 



imals of 



to 



the concluao; 

 ted, that '" 



ace 



epea 



atrix 



their 



, V be also 



cive 







ording » 



comp 



I? 



w* 



as= 



3 • 



To 



:^one 



off 



tf 



id 0* ^=,'', A c^ 



e 



N'cin^ 



toidS' 



APPENDIX D. 



Ixxxvii 



number of these eggs, observed for several days in succes- 

 (their identity was therefore incontestable), became 



sion 



transformed bodily, some into Rotifers, others into Nema- 

 toids. Other eggs presented an individualization of their 

 substance, that is to say, that which, in the preceding' case, 

 served to produce a superior organism, became converted 

 into little vesicles which moved about actively within the wall 

 of the ovum, and these little vesicles became as many Mona- 

 dincB which escaped from their chamber of incubation.' It is 

 impossible now to follow Dr. Gros into all the details given 

 in his longer memoir ^ which is illustrated by fifteen plates. 



In the life-history of Volvox glohator, according to 

 Dr. Braxton Hicks^ a portion of its contents, such as 

 would generally be devoted to the production of ciliated 

 gemmules, may occasionally be converted into a large 

 and distinct AincBba, Some of the masses, named Zoo- 

 spores, at. an advanced age, instead of undergoing a 

 process of self-division and breaking up into forty or fifty 

 small ciliated bodies, considerably increase in size, and 

 gradually assume an irregular outline. These altered 

 bodies present one or two nuclear-like particles in their 

 interior, and, like Ammhce, they are said to exhibit the most 



of form. 



-an 



/ 



changes 



distinct movements, accompanied by 

 In a subsequent communication ^ Dr. Hicks writes : 

 the autumn of i860 I had an excellent opportunity of 

 verifying my notes, and of tracing the change apparently a 

 step further. Out of a large number of Volvox collected in 

 the south of England, I scarcely found one in which the 

 state alluded to did not exist. In many, twenty of these 

 amoeboid bodies could be counted moving about immediately 



beneath the transparent sphere. 



o 



That 



they could not 



1 

 2 



3 



' Bull, de la Soc. de Natural, de Moscou,' 1847 

 'Journ. of Microsc. Science/ i860, p. loi. 

 Ibid. 1862, p. 96. 



