250 Confervoidca), Chroolepidaceae, Ctenocladus. 



Hollaiuische Maatschappij der Wetenschap., 3 Verz., Deel V, 1 Stiik 

 et Notarisia 1888, p. -159 (Etym. tJirix capillus et philos amicus). — 

 Thallus aerophilus, filamentis articulatis, irregulariter ramosis, in 

 stratis teiiuibus expansis conslitutus, amojne viridis ; filamenta sin- 

 gula late confluentia, ad apicem plerumque sensim attenuata, re- 

 ptantia. Ramuli uni-pauci-articulati, appendice radiciformi destituti. 

 Cellulae vegetativae cylindraceiie, diametro aequales vel Vo latiore lon- 

 gitudine, ad genicula leviter constricta3; chlorophora exigua, loculo 

 centrali sine colore, granulis minutis circuradato; membrana hya- 

 lina, firma, duobus stratis constituta. Cellulae vegetativse intume- 

 scentes in zoogonidangia transmutantur. 



Propagatio macrozoogonidiis et microzoogonidiis. 



Macrozoogonidia libera ovata, polo antico hyalino ciliis quater- 

 nis vibrantibus instructa, contentu viridi, ocello rubro non viso. 

 Microzoogonidia contentus divisione succedanea repetita orta, 32 

 in quaque cellula, pariete matricali lateraliter ostiolo poriformi 

 aperto liberata, raacrozoogonidiis minora, ovata vel angulata et 

 ciliis destituta. Verisimiliter statim porro evolventia, nec inter se 

 discedentia in tliallum transformantur. 



Generatio adhuc ignota. 



1. Trichophilus Welckeri Weber van-Bosse loc. cit. t. II, f. 8-11, 6i9 

 13-14 et in Notarisia 1888 p. 460. — Diam. cell. veg. 18 ad 20 y.. ; 

 macrozoogonidiis 7=: 4; microzoogonidiis 4-5^:2-3. 



Hab. inter cellulas corticales pilorum Bradyporum in Gu- 

 yana Americce australis (Welcker, Schlater). 



CTENOCLADUS Borzi [1883] Studi Algologici fasc. I, p. 27 (Etyra. 

 a cieia pecten et clados ramus), Wille Algologische Mittheilungen 

 p. 506. — Thallus e filamentis articulatis, ramosissimis, in ca)spitu- 

 los late confluentes densissime aggregatis stratumque pulvinato-spon- 

 giosum efticientibus constitutus; rami repetito unilateraliter ra- 

 mellosi, ad apices crebri, uni-pauci-articulati et hinc eleganter cir- 

 cinnato-cyraosi vel fastigiato-aggregati ; celluhx) vegetativae cylin- 

 draceae, diaraetro [equales vel Yo-2-pIo longiores, ad genicula leviter 

 constricta?; contontus granuloso-viridis, effusus, globulum arayla- 

 ceura fovens; raenibrana crassa aut crassiuscula, firma, tenuiter 

 et concentrice stratificata. 



Propagatio raacro- et raicro-zoogonidiis. 



Raraellorum apicaliura cellula' rlonique raagis eiongut;v aut uni- 



