^ 



llfis_ 



' all Of P ^0 



^''^ drop of 



turbid by ^^'^^ I 



' Mi 



APPENDIX D. 



Ixxv 



are 



escapes in the form of an elliptical bright-green cell, s^Vxr" i^ 



Protococcus. It exhibits a round, 



resembling a 



■lUiiib 



c«aj 



ii 





ts of the 



O 



( 





groups of 



primary 



^ich the 



nction of the extenoi 



diameter, 



transparent cavity, devoid of chlorophyll, corresponding in 

 size and in position to the vesicular body of the Amoeba^ and 

 resembling, at its colourless apex, the motile gonidia of 

 Cladophora. A few days later the elliptic or roundish cell 

 lengthens, a formation of transverse septa commences, and 

 the unicellular Alga becomes an articulated one. ... All 

 these transformations of Phytozoa into Spirilla^ Vibriones, 

 Monads, Amceb(£, unicellular and articulated AlgcB may be 

 observed, not only in the detached Phytozoa, but in those 

 which remain in the interior of the sections of the antheridia. 

 In those antheridia, of which the phytozoa are not fully ripe, 



the AmoebcB are seen to 



* ■ 



origmate 



in the middle of the 



Amm (Proteji: j internal mass of phytozoary cells : some of them make their 



re^u 



place pretty 



:*3 original size of 

 course of three or 



way out through the softened mass of cellular tissue ; but 

 others remain in the interior of the antheridum until their 



development into an articulated Alga. 



« • 



Contempora- 



. cments are very sk 



ncously with Avmhce, and often earher, there may be seen, 

 amidst the mass of Monads, bodies very similar in form and 

 irenberg. TheWal motion to the genus Bodo {socialis), and which increase by 

 four or five dap*} transverse division. They have the front end furnished with 



r part of its 



,d becomes motiom^ 

 contracting ra 

 , takes place in 



a long whip-shaped antenna or cihum similar to that of 



Euslena. 



At their first appearance, their motion, their 



ess 



are 



into 



crroups 



rtnig 



ht after 



.n point apP 



the 



arsi""' 



. this 



change of form, and their whole exterior differ so little from 

 the earliest states o^ Amoeba, i\izX at this period they cannot 

 be distinguished. In these early stages they both resemble 



foi 



up 



the 



t 



•ered 



w 



entire 

 •itha 



i 



i 



cull 



I 



i855'f 



■ S^' 



Chlamydomonas destruens of Ehrenberg. . . , The above 

 ■ms uniformly make their appearance, and always in the 

 succession above described. It is true that other forms such 

 as Uvella, and even Lepiojiiitce and Periconm, are sometimes 

 ^et with, the germs of which may have been imported by the 

 atmosphere during the observation; but these organisms, 

 '^hch always appear singly, and after the commencement of 



