190 A. A. MEXLD^ 0:S THK SHKBATOnOiS OF THE iLlT. 



to consist of abeohit^ bii w imc lB BD wad iuidi£5?i^ntiatad pralo- 

 T^aaoa. the existence of a propo* cell irall evieii being called m 

 questioii. XTiid^ such coaditioas it seens ^fficolt to understmBd 

 kcw th€se wonderful todies were supposed to ac«)mpl:>h their 

 foBCtkai save by a purely ^eaueal prccess. In lS6o. T-^r. 



Scbwei^r^^r-Sadel and La Yalecte St. George were . : :: 



KaTe proved that the spenftatozoon coiisists of .^ rte cell 



™^.ie up erf nucleus and cytofilasai, and tlt^re can be little doubt 

 t this dew is the correct one. 



In the ninth edition of Carpenter s " Human Phy^olo^." 

 pubiisii-ed in IS^l, the following description of these interesting 

 orsanisms is found (p. S " "* The kunan spermatozoon ccmsists 

 of a small liattened discoid * head " 5 /a in length and 1-2 /& in 

 thickness, an intermediate ponkn 6 /i ir ' .~h. from whi^ 

 prcc€€ds a long liESmft ^tail,' gradual^ tapenng to dhe finest 

 pcmt, ci ^> ft in ioigtii. Tbe wUe is perfectly tzaB^wre&t, 

 and notiiiiig: iisxk can be lermed ' stractnre ' can Ire satxs£act(xfly 

 4^sti]^;iushed witliin it. * 



The view widely h^ld at the prese&t time. wLieii will be found 

 eixplained at length in Dr. Wilson's exai^mely interesting 

 MI "The CeH"* i^2nd ed^on, 190C>X ^ ^^^^ ^-^ human 

 ajunal FpemaAioK)^ ccosists of foctr parts — L:. 1 , tli^e iiiide«Es, 

 forming the irsin portion cz thf r.-^. '- t) the ao-rastxiiitf, an 

 apical body lying st the front t " - -^, head; (3) the middie 

 or coiUKCtiiig piece, a cy: . : b>iy lying ': '. the head 



and giring attt. ■ _ from, which it is not always 



disdncdy i_-_^--.-. .± . x :_f tail or flageUiiim, whiek 



coD^sts c: """""" " ■:ed aiial ~ - tiaded by a cyto- 



plasmi. soMtftiiwr I ^de a fin-Kke 



Wiriwhtmg L _ T - > _ t tip . _ _ r 



envelope is said to ^ - _ - 



laaving a abort c .r. ^- - _ -""t:'rs :•? ^'^^'er?-^. 



* •'The Cell ia DereliCfiBeE.: sci. T-:-: — i- t^;. ;- :Lir;i:Li 3. "^^HIscc 



