206 



Proceedings of the Royal Irish Academy. 



ADDITIONAL SPECIES. 

 The species enclosed in square brackets are not, strictly speaking, 

 additional, as they appeared in the " Synopsis " under a different name. 



A. — Freshwater Species. 



I.— Flagellatae. 

 Bicoeca 



lacustris J. CI. M. 

 Cryptomonas 



erosa Ehr. U. 

 Diplosigopsis 



frequentissima Lemm. M C. 

 Euglena 



viridis Ehr. U. 

 Lepocinclis 



ovum Lemm. U. 

 Mallomonas 



acaroides Pertij. M C. 



candata Jivanoff. M. 



producta Iwanoff. C. 



II. — Diatomaceae. 

 Navicula 



Legumen Ehr. U. 

 Rhopalodia 



gibba 0. Mull. U. 



III.— Cyanophyceae. 

 [Chroococcu3 



minimus I^mm. L U.] 

 [Gloeotricbia 



ecbinnlata P. Ricluer. M L C U. 



natans J?rt6/i. LU.] 

 [Schizothris 



Friesii Gom. ML.] 



DOUBTFDL. 



Calothris 



caespitula Harv. M. 

 Polycystia 



persicinua &iUw. U. 



lY.— Desmidiaceae. 



Cosmarium 



corriense Biss. M. 



cymatonotophorum West. C. 



[decedens Bacib. M C L U.] 



didymoprotupsum TV. d- G. S. 

 West. C. 



etchachanense Roy & Biss. M. 



furcatospermum W. <£ G. S. West. 

 V. 



nasutum Nordst. M. 



obcuneatum West M. 



[repandum Xordst. L.] 



retusum Rabh. C. 



sesnotatum Gutw. C U. 



subturgidum Schmidk. C. 



Tumeri Eoy. U. 

 Btaurastrum 



arachnoidea West. C. 



bifidum Brdb. L. 



Doubtful. 

 Cosmarium 



minutissimum Arch. Ireland. 



substriatum Nordst. M C. 



Staurastrum 



armigerum Brdb. L. 



spinosum Brdb. L. 



Y. — Chlorophyceae. 

 [Ankistrodesmus 



convolutus O. S. West, L U.] 

 [Cliodatella 



amphitricha Chod. C] 

 Crucigenia 



beteracantha {Nordst.) C. 

 [Microspora 



pacbyderma Lagerh. M C] 



