ULVACE.E. 251 



Bangia ceramicola. The Cerammm Bangia. 



Fronds parasitic on Algse, about an inch and a half long, 

 simple, very slender, and flaccid, of a beautiful rose-red 

 colour. 



When examined under a microscope, the fronds of 

 this species appear to be jointed, and in mature spe- 

 cimens the spaces between the joints to be striped 

 lengthwise. These appearances are deceptive, and in 

 reality what seem to be joints are but constrictions 

 of the transparent sheath of the frond, and the stripes 

 are produced by the division of the granular en do- 

 chrome. 



Bangia elegans. The elegant Bangia. 



Fronds parasitic on Algse, minute, forkedly branched, with 

 spreading axils. 



This species is very rare. The only recorded British 

 specimens are from Portaferry, where they were dredged 

 many years since by Mr. Thompson. 



Genus CIX. ENTEROMORPHA. 



Fronds green, tubular, simple or branched, composed of 

 a net-like membrane. Fructification, zoospores produced 

 in the cells of the frond, generally in groups of four. — 

 Exteeomoepha, from the Greek enteron, an entrail, and 

 morphe, form. 



The plants included in this genus are probably more 

 widely distributed, and grow in greater variety of cir- 

 cumstances, than those of any other sea or water-weed. 

 Not content with ranging over the ocean, from the poles 



