Adams — A List of Synonyms of Irish Algae. 181 



IV. — Desmidiaokae — contirmed. 



Pleurotaenium 



minutum Delj}. = Penium minutum Cleve. 



nobile Bichier. = Docidiiim untlulatum Bail. 



nodulosum De Bary. = P. coronatum Rabh. 



rectum Delp. = P. Trabecula Ncig. 



Sceptrum W. £ G. S. West. = P. tridentulum West. 

 Spbaerozosma 



filiforme Elir. = Onychonema nordstedtiana Turn. 



secedens De Bary. = Spondylosium secedens Arch. 



Spirotaenia 



endospira Arch. = S. bryophila Rabh. 

 muscicola De Bary. = S. bryophila Rabh, 



Spondylosium 



pulcliellum Arch. = Spbaerozosma pulchellum Babh. 



Staurastrum 



braehycerum Breb. = S. polymorphum Breb. 

 convergens Ehr. = Arthrodesmus convergens Ehr. 

 depressum Nag. = S. muticum Brib. 

 eustephanum Balfs. = S. furcigerum Breb. 

 Incus Breb. = Arthrodesmus Incus Hass. 

 octocorne Ehr. = Arthrodesmus octocornis Ehr. 

 Pringsbeimii Beinsch. = S. polytrichum Perty. 

 pseudofurcigerum Beinsch. = S. furcatum Breb. 

 Sancti-Sebaldi Beinsch. = S. Sebaldi Beinsch. 

 stellatum Beinsch. = S. sexangulare Babh. 

 subulatum Kiitz. = Arthrodesmus subulatus Kiitz. 

 tenuissimum Arch. = Arthrodesmus tenuissimus Arch. 

 terebrans Nordst. = S. elongatum Barker. 

 trachynotum West. = S. aculeatum Mcnegh. 

 tricorne Menegh. = S. hesacerum Wittr. 



Tetrachastrum 



mucronatum Arch. = Micrasterias oscitans Balfs. 

 oscitans Dixon = Micrasterias oscitans Balfs. 

 pinnatifidum Dixon = Micrasterias oscitans Balfs. 



Xanthidium 



bisenarium Ehr. = X. cristatum Brib. 



furcatum Ehr. = X. armatum Brdb. 



octocorne Ehr. = Arthrodesmus octocornis Ehr. 



