178 Proceedings of the Royal Irish Academy. 



m. — Ctaxophyoeae — cmitinucd. 

 Trichormus 



incurTUS^ZZ;7M7i= Anabaena Flos-aquae Breb. 



spiralis Balfs. = Anabaena circinalis Babh. 

 Zonotricliia - 



alpina Eiitz. = Eivularia Haematites Ag. 



rivuiaris Nag. = Kivularia Haematites Ag. 



I¥ . — Desmidiaceae. 

 Anisopleura 



coustricta Arch. = Cosmocladiuni constrictum Jush. 

 Artbrodesmus 



longiconiis Boy. = Staurastrum jaculiferum West. 



Rallsii West. = A. Incus Hass. 

 Bambusina 



Borreri Bal/s. = Gj-mnozyga moniliformis Ehr. 

 Closterium 



directum Arch. = C. Ulna Focke. 



linea Perty. = C. acutum Brib. 



obtasum Brib. = Boya obtusa W. <f G. S. West. 

 Coccochloris 



protuberans Sprcng. = Mesotaenium macrococcum Boy. d Biss. 

 Conferva 



dissiliens DUlw. = Hyalotheca dissiliens Brib. 



mucosa Mert. = Hyalotbeca mucosa Ehr. 

 Cosmarium 



angustatum Nord. = C. pokornyauum W, & G. S. West. 



ansatum Kutz. = Euastrum ansatum Balfs. 



bipapillatum West. = C. Boeckii 11 'i7^. 



concinnum Beinsch. = C. angulosum Brib. 



confusum Cooke. = C. margaritiferum Metiegh. 



crenatum Balfs. = C. undulatum Corda. 



crennlatum Nag. = C. Meneghbiii Brib. 



curtom Halfs. = Penium curtum Breb. 



cylindricum L'alfs. - C. Balfsii Brib. 



dissimile Nordst. - Euastrum sublobatum Brib. 



elegans Nordst. = C. annulatum De Bary. 



Elfvingii Kacib. = C. rectangulare Grim. 



emarginulum Perty. = C. Hammeri Beinsch. 



gemmiferum Brib. = C. Botrjtis Mencgh. 



gotlandicum Wittr, = C. rectangulare Gnin. 



Klebsii Giitw. = C. subtumidum Sordst. 



