f' 



384 



THE BEGINNINGS OF IIEE. 



r , 



coarse of a few minutes— each of which^ after it has 

 attained a length of about -gio'^ gradually develops a 

 terminal^ spherical^ or ovoidal dilatation^ which becomes 



? 



Fig. 76. 



Mode of Origin of Trichomonas^ and its Transformation into Acti- 



nopbrys and Amceha, (Reduced, from Nicolet.) 



a-e. Different stages in the formation of a germinal globule. 



/• S' Segmentation of its contents into embryo specimens of Tricho- 



mo7ias {h, i,j). 



k, I, n. Forms subsequently assumed by these bodies, which, later still, 



become converted into Actinophrys (in) or Anicaha (0)— the 



latter rapidly increasing in size {p). 



filled with a granular mucilage^ poured into it through 

 the . tubular portion ^. Soon, however, fluid ceases to 



^ Mr. Archer describes in 'Journal of Microsc. Sc/ i860, vol. viii. 

 p. 227, the production of somewhat similar tubes from a portion of 

 a large Desmid, through which ciliated zoospores are subsequently dis- 

 charged. These appear to be produced by a breaking up of the endo- 

 chrome of the frustule itself, near the part whence the tube issues. 

 When discharged the zoospores were found to be ggVo" ^^ diameter, and 

 provided with a single cilium. They, in fact, very closely resembled the 

 bodies whose production Mr. Carter had watched within the so-called 



contents soc 



)re distinct. 

 ^ere displaccriK 

 iDj movement o 

 (itents have b 



ies-about fi 



\ 



in eitent and n 

 'i gives exit 



■5 similar 



m Trkto 



^* become 



^ov.a 



no 



^*e soniev 

 ^tone 



es 



"^ 



W of 



'' ''' situate. 



i tile 



re is 



air. 



51.;, 



•aa 



ey 



■cells 

 1 



'«f- still ,, 





■^ 



'0% 



"^us^ 



\ 



II, 



:a 



rr^^ 



•e: 



PI 



