A LIST OF THE ALG^ OF LAMLASH BAY,. ARRAN. 67 



Ascophyllum, Stackh. 



A. nodosum, Le Jol. ( = Fuciis nodosus, Phyc. Brit.). 

 Pelvetia, Dene, et Thur. 



F. canaliculata, Dene, et Thur. ( = Fucus canaliculatus, 



Phye. Brit.). 

 Halidrvs, Lvnojb. 



H. siliquosa, Lyngb. 



COHORT DICTYOTIN^. 



Order DiCTYOTACEiE. 

 Dietyota, Lamx. 



J), dichotoma, Lamx. 



SERIES RHODOPHYCE^. 

 COHORT PORPHYRI^^^. 



Order PoRPHYRACEiE. 



Erythrotrichia, Aresch. 



E. carnea, J. Ag. 

 Porphyra, C. Ag. 



P, laciniafa, C. Ag. 



COHORT NEMALIONIN^. 



Order Helminthocladiace^. 



Aerochsetium, Nag. { = Callithamnion virgatida, Phyc. Brit.). 

 A. virgatula, J. Ag. (= Call. Baviesii, Phyc. Brit.). 

 A. Daviesii, Nag. 



Order Ch^tangiace^. 



Tribe Scinaiese. 

 Scinaia, Bivona. 



S.furcellata, Bivona (= Ginnania furcellata, Phyc. Brit.). 



Order Gelidiace.e. 



Tribe Gelidiese. 

 Gelidium, Lamx. 



G. crinale, J. Ag. 



