CH^.TOPELTIS 353 



Fa7n. IL Cfciiocladiaccte. 



Frons filamentosa, ramosa ; ramuli ad apices haud piliferi ; cellulis 

 chromatophoro parietali, laminfeformi, irregulariter laciniato-stellato, 

 pyrenoide unico instructo, prfeditis. 



Tribus ].' Protodermeae. 



Ramuli lateraliter plus minus simul concreti et thallura expansum 

 substrato adnatum efRcientes. 

 Protoderma Ktz. 

 Ulvella Crouan (Pringsheimia Reinke). 



Tribus 2.^ Entodermeae 



Ramuli alterni liberi [Endobiece). 



Entoderma Lagher. (E pi ci a dia Reinke). Cellula3 omnes fructi- 

 ferse; macrozoosporse ciliis 4. 



Chloroclonium mihi. Ramulorum cellul£e terminales solum fructi- 

 feras; macrozoosporse ciliis 2. 



Tribus 3." Ctenocladieee. 



Ramuli liberi, secundatim dispositi v. saltem juniores,opposite distici. 



Chlorotylium Ktz. Cellulae omnes fructiferse ; macrozoosporse ciliis 4. 



Ctenocladus mihi. Cellulae apicales in zoosporangia transmutataa ; 

 macrozoosporK ciliis 2. 



Pleurothamnion mihi. Ramuli opposite distici saltem juniores; cel- 

 lulae omnes denique in zoosporangia evolutae ; raacrozoosporc-e ciliis 2. 



Fam. IV. Ulotliricliiaceìe. 



Frons filamentosa, simplex; cellulis chromatophoro parietali, lami- 

 naeformi, margine integro, pyrenoide centrali, unico, instructo. 



A. BoRzl. sitici! Atoologicl. io 



