9 



deas Genera vesiculis destituta, quss> saltim hoc respectn 

 potius cuin Larninarioideis comparanda quis putaverit. Sunt 

 ita alii characteres, quibus congruentice mice, indicantur, alii 

 quibus affinitates *). Et in Systemate struendo naturali e jus- 

 modi distinctionein inter characteres, quos congruentias vitae 

 cujuscurnque ordinis sint (Pisces et Cetacece; Batrachia corn- 

 paratis Ranunculis] et quibus affinitates proprise atque verse 

 indicantur, ubicumque quserendarn esse, vix quispiam hodie 

 denegaret, si quoque coguitae sunt observationes, de quibus 

 quid sibi valeant forsan cuidam dubiuni videretur **). 



Si vero quoque assumendum videretur aliis characte- 

 ribus aliam omnino significationem attribuendaiu esse; alios 

 niniirum esse characteres, quibus indicari videntur rationes 

 vitee diverse (ipsum quasi modum vivendi); alios autem 

 quibus typi diversi designantur, et quorum inodis invicem 

 plus minus diversis hanc suam vitam peragentibus Genera 

 constituuntur ejusdem familiae di versa; facilius quoque in- 

 telligendum putarem affinitates horum Generum nunc ob- 



*) Cfr. quse hoc loco infra attuli de Speciebus Gracilarice scri- 

 bens, de Significatione diversa characterum, quorum aliis modum vi- 

 vendi proprium indicant, aliis vero affinitates illustrantibus. 



**) Quae turn de Coelebogyne, turn de devio cursu quo foecunda* 

 tionem perfici in familiis quibusdam observarunt, aliisque ejusmodi 

 observationibus, id hodie in qusestione de systematica dispositione tu- 

 tius omittenda videntur; si quoque verba qusedam a Davies dicta (Bot. 

 Gaz. p. 515) hsec spectarent: The most striking features of Oltmanns 

 contributions is the manner in which he has swung away from the 

 complex and frequently obscure theorizing of Schmitz and presented 

 an explanation comparatively simple in the demands it makes upon 

 the facts and perfectly in accord with the stand that biology 

 takes as to the essential conditions and characteristics of 

 the sexual act. To appreciate thoroughli Oltmanns views 

 it is necessary that one should know the peculiarities of 

 the theory of Schmitz and wherein they departed so radi- 

 cally from certain general conclusions of biological science.* 

 Ipsum vero Oltmanns dixisse putarem, congruentias quasdam vitse 

 nullomodo indicare affiiiitates certas; quin immo eum dixisse iieinini 

 Botanicorum in mentem venisse statuere Bryoideas a Florideis dedu- 

 cendas esse; nee easdem vera affinitate conjuiictas considerandas fore 

 (1. c. p. 135). 



