Protor.nccoideiiG, Palmellacnre, Clilorotliecium. fiS7 



tunc (divisione substrato parallela) colonias dendroideas ') effi- 

 cientia. 



Generatio loogonidiis .singulis vel binis in cellulis omnibus for- 

 nuTo dendroidea"^ ortis ^j^ pep colliila^ matricis oi-ificium circulare 

 libere examinantibus, iis forma^, protococcoidea^ similibus at ple- 

 rumque minoribus tum agamice tum copulatione peracta germi- 

 nantibus. Zygota (negative pbototactica) colonias palmelloideas ger- 

 minando eflficientia. 



1. Mischococcus confervicola Naeg. Gatt. oinzell. Alg. p. 82. t. II i38o 

 D, Rabenb. Krypt. Flor. von Sacbs. p. 132, FI. Fur. Algar. III, 

 p. 54, Cooke Brit. Fresbw. Alg. p. 28, t. 11, f. 4, WoUe Fresbw. 

 Alg. U. S. p. 200, t. 155, f. 36-41, norzl I. c. — Cellulis globo- 

 sis, levibns, 4,5-9 a. diam,, geminis, ternis quaternisve in ramulo- 

 rum apicibus, Ia?te viridibus. subtilissime granulosis, pyrenoide de- 

 stitutis; stipite hyalino, quasi articulato ; geniculis sa^pe globoso- 

 tumidis, vacuis; zoogonidiis 2-6 u. longis 



TTnb, ad algas varias, imprimis Confervam, Vaucberiam, 

 CEdogonium, nec non ad caules, petiolos foliaque Marsilenp, 

 S a 1 V i n i a^, M y r i o p h y 1 1 i, P o t a m o g e t o n i s etc. in stagnis, fon- 

 tibusque Helvetia^ (Naegeli), Germani;r' (Rabeniiorst), Italia? (Bor- 

 zi, Martel) Belgii (De-Wildeman), Suecia; (Lageriiei.m), Britan- 

 nia? (Cooke, Douglas), Americai borealis (Wolle). 



CHLOROTHECIUM Borzi [1885] in Martel Contribuz. alla conosc. del- 

 TAIgoI. Romana in Annuar. del R. Ist. Bot. di Roma anno I, 

 fasc. II, p. inO (Etym. chloros viridis et fhcca capsula) et in No- 

 tarisia 1886, p. 18, Borzl Cblorothocium Pirotta? in Malpighia II, 

 1888, p. 250-259. — CcIIula! initio singubip, obovales v. obovato- 

 oblonga?, characiiformes, basi stipiti disciforme dilatato substrato 

 adfixa^, membrana tonui byalina, contentu cblorophyllaceo amoene 

 viridi, in cblorophora ambitu acute definiia, disciformia, margine 

 subirregulari, parietalia, 2-4 (raro 1 vel ultra 4), pyrenoide desti- 

 tuta segregato; nucleus singulus, quasi centralis; substantia amy- 

 lacea nulla; divisio cellularis ad tres directiones alternans; cel- 



1) Subinde etiam (at rarius) cellulae veffetativa». singuhe coloniarum in 

 cfEspitulos dendroides transmutantur. 



2) Oriuntur liaic zoogonidia, observante claro Borzi !, c. p. 141, dum cel- 

 )nl;B formfe dendroide,'ie sensim scnsimqne diminntfc mfnimum attinjrunt. 



