22f! Marine. Alga} of Berwick-on-Tweed. 



Family — Confervace.e. 



Epicladia. 



Gomontia. 



Chretomorpha. 



Ulothrix. 



Ehizocloniinu. 



Cladophora. 

 Family — Bryopside.e. 



Bryopsis. 

 Family — Valoniace^e. 



Codiolum. 



Order III.— OOSPORES. 



Family — Vattchemace m . 

 Vaucheria. 



Class III.-P H.EOP H Y C E M 

 Order IV.- PHiEOZOOSPOEEJE. 



Family — Scytosiphonacfje. 



PhylHtis. 



Scytosiphon. 

 Family — Punctariace^e. 



Litosiphon. 



Punctaria. 

 Family — Desmarestiaceje. 



Desmarestia. 

 Family — Dictyosiphonace/E. 



Dictyosiphon. 



Stictyosiphou. 

 Family — EctocaepacezE. 



Myriotrichia. 



Streblonema. 



Ectocarpus. 



Isthmoplea. 



Pylaiella. 

 Family — SphacElabiace^e. 



Battersia. 



Sphacelaria. 



