l^S SYXOrSIS OF BRITISH SEAWEEDS. 



minute, rimple, straight, compressed, purple; grains tw< 



three in each transverse band, globose, sometimes solitary, 

 1/ v. Hook. B. Fl. r. 2.p. 316. (Atlas, PL L\\l\ . 



!"._ 348.) 

 Gkmiotrichum oeramicola, var., A'/.. 

 Hal. On tht" margina of old leaves of Zostera marina. Annual. 



Spring. 

 By much the most minute of the genuine species of 

 JBangia. and not very different from what the youngest 

 suite of B. fusco-purpurea may be supposed to be. It 

 may he found probably in many places where it has been 

 overlooked, its minute size protecting it from all but a very 

 careful eye. On the other hand, its bright colour will 

 make it to be easily detected, when specially sought for. 



347. ceramicola (The Ceramium Bangia); filaments parasitical, 

 very slender, flaccid, elongated, rosy ; articulations once or 

 twice as long as broad, longitudinally striate ; the endo- 

 chrome " at length globular and escaping through the broken 

 tube," Chauv. fiecherches, etc. p. 29. (Atlas, PI. LXXIV. 

 Fig. 349.) 



Ceramium ceramicola, Ag. Goniotrichum ceramicola, Ktz. Con- 

 ferva ceramicola, Lyngb. 

 Hob. Parasitical on the smaller Algae, in tide-pools. 



The figure in * Phycologia Britaunica,' from which that 

 in the Atlas is copied, is taken from a specimen communi- 

 cated to me by the late Dr. Landsborough, and exhibits 

 the characters of the plant so far as it is possible to arrive 

 at them from a dried specimen. 



348. carnea {The flesh-coloured Bangia) ^ Dilliv. t. 84. 

 Hal. ? 



This species, described and figured by Dillwyn in his 

 ' British Confervas, ' is unknown to me. 



349. elegans (The elegant Bangia) ; filaments minute, dichoto- 

 mously branched, with very patent axils; branches contain- 

 ing a single row of simple or binate, purple granular cells, 

 Chauv. Mem. Soc. Linn. Norm. v. 6. p. 13. (Atlas, PL 

 LXXIV. Fig. 350.) 



Hob. Parasitical on the smaller Algse. Very rare. 



The only British specimen of this curious and beautiful 

 little plant that I have seen, was dredged several years 

 ago by my friend Mr. Thompson, of Belfast, who commu- 

 nicated it to me, and allowed me to retain a portion, from 

 which the figure here given has been prepared. This I 



