Report of Fauna and Flora Committee — Irmli Phceophyce(B. 453 



Halopteris, Ktitz. 



S. filicina, Kiitz. {Sphacelaria filicina, Ag., in Phyc. Brit.^ 

 pi. cxlii.). 10-14. 



S. (?) Sertularia (Bonn.), Kiitz. {Bphacelaria Sertidaria, Bonn., in 

 Phyc. Brit., pi. cxliii.) 10. 11. H. 14. 



Stypocaulon, Xiitz. 



S. scoparium^ Kiitz. 



On all the coasts. 



Order IX. — Mykiokemace^. 



Myrionema, Grev. 



M. strangidans, Grev. (J/, vulgare.) 



Common on the Ulvaceae, on all the coasts. 



f. pimctiformis (M. pimctiforme, Phyc. Brit.). 14 Mc. 



Forms small spherical tufts, epiphytic on Floridese (Cera- 

 minm, etc.). 



Ascocyclus, Magnus. 



A. Leclancherii, Magn. {^Myrionema Leclanclierii, Harv. in Phyc. 

 Brit., pi. 41.) 10-14. Ou. Rhodymema pahnata, Grev. 



A. orbicularis. Eke. 12 IST. • 14 IS". 



On Zostera, forming dark patches 1 mm. wide, edges 

 fringed when dry. 



Ralfsia, Berk. 



a. Stragidaria. 



R. clavata, Crn. 12 N. 



Forms orbicular patches, on stone. (Eeinke's "Atlas 

 d. deutsch. Meeresalg.," Tf. 5 u. 6.) 

 I. Euralfsia. 



R. verrucosa, Aresch. 10-14. 



This, the common species, is easily sej)arable from its 

 substratum. 



