70 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



Tribe Griffithsiete. 

 Griffitlisia, C. Ag. 



G. corallina, C. Ag. 



G. setacea, C. Ag. 



Tribe Callitbamniese. 

 Rhodochorton, Niig. 



R. florldidum, Nag. 



Callithamnion, Lyngb. 



C. 2>olyspermuin, C. Ag. 



C. Hookeri, C. Ag. 



C. arhuscula, Lyngb. 



C. tetrago7ium, C. Ag. 

 G. corymhosum, Lyngb. 

 G. granulatum, C. Ag. 

 G. byssoides, J. Ag. 



Tribe Ptiloteffi. 

 Plumaria, Schmitz. 



P. elegans, Bonnem. 



Ptilota, C. Ag. 



P. plumosa, C Ag. 



Tribe Crouaniese. 

 Antithamnion, Nag. 



A. plurnula, Thur. ( = Callithamnion jylumula, Phyc. Brit.). 



Tribe CeramieEe. 

 Geramium, Lyngb. 



G. tenuissimum, J. Ag. (= C. nodosum, Phyc. Brit.). 



G, diaphanum. Roth. 



G. rubrum, C. Ag. 



G. acanthonotum, Carm. 



Order DuMONTiACEiE. 

 Dudresnaya, Bonnem. 



D. cocoinea, Bonnem. 

 Dilsea, Siackh. 



D. edulis, Stackh. 



Tribe Halarachniese. 

 Halarachnion, Kiitz. 



H. ligidatum, Kiitz. ( = Halymenia ligulata, Phyc. Brit.). 



Furcellaria, Lamx. 



F. /astigiata, Lamx. 



