Marine Algce of Berwich-on-Tweed. 225 



Classes, Orders, and Genera of the Marine Akjce of 

 Berwick-on-Tweed. 



Class J.— C YAKOPHYC E M. 

 Order I.— SOHIZOPHYCE7R. 



Family — OimooeoccACEjE. 



Gttoeocapsa. 



Dermocarpa. 



Polycystis. 

 Alg^: jncert^e sedis. 



Goniotriehum. 

 Family — Nostochine^e. 

 Tribe I. — Osoillarieje. 



Spirulina. 



Oscillaria. 



Microcoleus. 



Symplooa. 



Lyngbya. 



Noctularia. 



Sphferozyga. 

 Tribe II. — Bivularie^e. 



Pavularia. 



Isactis. 



Oalothrix. 



Microchajte. 



Mastigocoleus. 



Class II.— C ELOROPH YCE^l. 



Oder II.— OHLOBOZOOSPOEE^. 



Family — Ulvace^e. 



Prasiola. 

 Monosti-oma. 

 Enteromorpha. 

 Ulva. 

 lp 



