28 



Proceedings of the Roijal Irish Acculemjj. 



V. CoXJUGATiE. (ft) 



Penium — continued. 



minutissimum Nordst. U. 



minutiTin CJeve. M L C U. 



Mooreanum Arch. M L C U. 



Navicula -Br^i. MLCU. 



phymatosporum Xordst. L. 



polymorpbum Perty. MLCU. 



rufescens Cleve. C. 



rufopellitum Eoy. C. 



spinospermiim Josh. U. 



spirostriolatum Barker. M C U. 



suboctaiigulare West. M. 



truncatum Breb. MLCU. 

 Pleurot^nium 



clavatum De Bary. L C. 



coronatum Bahh. MLCU. 



Ehrenbergii Be Bary. MLCU. 



maximum Lund. M C. 



minutum Belponte. L. 



nodosum Lund. C. 



nodulosum De Bary. L. 



rectum Delp, M. 



Trabecula .A%. MLCU. 



tridentulum West. C U. 



truncatum Nag. M L C. 

 Eoy a 



obtusa IT'. S G. S. West. M L C. 



Pseudoclosterium W. S G. 8. West. 

 U. 



Sphffirozosma 



Aubertianum West. C. 



excavatum BaJfs. MLCU. 



granulatum Roy. et Biss. M C U. 



pulcbellum Eabh. MLCU. 



secedens De Bary. C. 



vertebratum Balfs. M L C. 

 Spirotaenia 



acuta Hilse. C U. 



bispiralis West. C. 



brj'ophila Eabh. L. 



coudeusata Breb. MLCU. 



DESiUDiACE.E — continued. 



Spirotgenia — continued. 



endospira Arch. L. 



minuta Thur. L U. 



obscura Balfs. M L C. 



parvula Arch. L. 



tenerrima Arch. L. 



trabeculata A Br. U. 



truncata Arch. M L U. 

 Spoudylosium 



ellipticum W. S G. S. West. U. 



papillosum W. d G. S. West. U. 



pulelirum Arch. M C. 



pygmgenm TI". d- G. S. West. C. 



secedens Arch. U, 



tetragonum West. C. 

 Staurastrum 



aciculiferum Anders. U. 



aculeatum Menegh. M L U. 



alternans Breb. MLCU. 



amcenum Hilse. M C. 



anatinum Cooke d Wills. MCU. 



apiculatum Breb. MLCU. 



Aracbne Balfs. M C U. 



Arcberii West. C. 



Arctiscon Lund. M C U. 



arcuatum Nord. M L C. 



aristifernm Balfs. C. 



Arnellii Boldt. U. 



asperum Breb. M L C. 



aversum Lund. C. 



Avicula Breb. MLCU. 



bacillare Breb. M C. 



barbaricum W. d G. S. West. U. 



Bieneanum Eabenh. M C U. 



brachiatum Balfs. MLCU. 



Brasiliense Nordst. M C. 



Brebissonii Arch. L U. 



brevispinum Breb. MLCU. 



Cerastes Lund. Ireland. 



connatum Boy et Biss. MLCU. 



contortum Delp. C. 



