182 Proceedings of the Royal Irish Academy. 



Y. — Other Conjugatae. 

 Conferva 



ericetomm Both. = Zj-gnema ericet-omm Hansg. 



genuflexa Dillw. = Mougeotia genuflexa Ag. 



pnrpurascens Cam. = Zygnema ericetorum Hansg. 

 Mesocarpus 



nummuloides Hass. = Mougeotia nummuloides floss. 



parvulus Hass. = Mougeotia parvula Hass. 



robustus De Bary. = Mougeotia robusta Wittr. 



sealaris Hass. = Mougeotia scalaris Hass. 

 Sirogonium 



sticticum Euts. = Cboaspis stictica 0. Euntze. 

 Spirogyra 



ortbospira yug. = S. majuscula Eiitz. 



princeps Vauch. = S. nitida Link. 

 Staurocarpus 



coerulescens Hass. = Mougeotia capucina Ag. 

 Staorospermum 



gracillimom floss. = Mougeotia gracillima Wittr. 



quadratom Hass. = Mougeotia quadrata Hass. 



viride Eiitz. = Mougeotia viridis Wittr. 

 Tyndaridea 



cruciata Han. = Zygnema crnciatum Ag. 



pectinata Harv. = Zygnema pectinatum Ag. 

 Zygnema 



declminum Ag. = Spirogyra decimina Eiitz. 



nitidum Ag. = Spirogyra nitida Link. 



quininom Ag. = Spirogyra porticalis Ckve. 

 Zygogoninm 



didymom Babh. = Zygnema ericetorum Hansg. 



ericetorum Eat:. = Zygnema ericetorum Hansg. 



YI. — Chlorophyceae. 

 Acantbococcus 



aciculifer Lagerh. = Trochiscia aciculifera Hansg. 

 Apbanocbaete 



globosa Wolle = Cbaetosphaeridium globosum Elebahn. 



repens A. Br. = Herposteiron confervicola Ndg. 

 Bulbocbaete 



pringsbeimiana Arch. =B. insignia Pringsh. 



