f//^ 



276 



THE BEGINNINGS OF LIFE, 



from a certain pestilential disease^, and although they 

 may, as M. Davaine imagines^ exhibit close affinities 



Fig. 19. 



Oscillatorice and other simple Fresh-water Algee (HassalP). These 



forms are known by the following names : 



a, Lynghya prolifica, 



b, „ vermzcularis, 



c, Raphidia viridis. 



d, Tolypothrix rufescens. 



e, Microcoleus gracilis, 

 /. Oscillatoria autnmnalis. 



„ splendida. 



b. Spirillum Jenneri. 



i, Nostoc commune. 



to the low algge known as Oscillatoria^ they, on the 



1 The ' Miltzbrand/ ' sang de rate/ or ' the blood,' as it is called in 

 different countries; and from the contagion of which the Malignant 

 Pustule of man is produced. 



2 Selected from Hassall's 'British Fresh -Water Algse,' in order to 



show the simple structure of the filaments. 



3J 



.(lllOll 



Ids.' ^ 



=t part, q^5te ^ 



4m ''' '' 

 0ute seg'" 



In addi 



leotioned, there 



Spr'ilh 



k senos 



'. i'ements, 



and 



fh twisted in' 



• ' 



It will be easi, 



must var 



according to the 

 »al kinds of Oi 



> . t 



! 



sition. 

 s and the 



'"^e first thine 



homogen^ 



tsei 



""' ^^;^«;^; 



' ' the 0,. 



•erf 



J 



*ffr;. 



gan 

 3 anH 



'' for a 



is 



Ion 

 alto 



) they ^ 



