ptoh iM i \< y.r.. 1 1 1 



another of its distinguishing characters, the peculiarly np- 

 righl and rigid frond. When in perfect fructificati< 

 easily recognized; the clustered tubercles and the lanceo- 

 late pod-like tips being both very Btriking characteristics. 



LYlil. ffYPB i. \. ( 5 8TOCLONIU1L 



189. purpurascens (Tin purple Cystoclonium)] frond dull pur- 

 plish-red, excessively and irregularly branched, bushy, carti- 

 laginous, soft : branches alternate, clou-ate, densely clothed 

 with Blender, many-tunes-divided branchlets, whose olthnate 

 divisions are setaceous ; tubercles Bpherical, immersed in the 

 ramuH, Harv. Phy. Brit. pi. L16. (Atlas, IM. \J.III. 

 Fig. 11)5.) 

 Gracilana purpurascens, G • Plocaria purpurascens, I'.,"/!. 

 Hypnea purpurascens, Harv. Gigartina purpurascens, La- 

 mow. SphsBrococcus purpurascens, Ay. Fucus purpuras- 

 cens, Huds. V. tuberculatum bightf. 

 Hal). Very common on all the British shores. On ruck- and 

 tea, within tide-marks. Annual. Summer. 

 [In the * Phycologia Britannica' J incorrectly referred 

 tile Fucus purpurascens, Huds., to the modern genus Hyp- 

 nea s mistaking analogy for affinity, but I have Long since 

 abandoned this error, and adopted the genus Cystoclonium 

 of blitzing, founded ^m the present species. 1 merely re- 

 tain " Hypnea" between brackets in the present publica- 

 tion because it is the name now commonly known to Eng- 

 lish collectors. Cystoclonium purpurascens is among the 

 commonest of our Algae, very variable in appearance, and 

 widely dispersed through the North Atlantic. — AY.IJ.1L] 



Okder 12. CR YPToyi-MIA ( 'EM 



U\. GBATELOUPIA. 



100. filicina {The fern-like Gratelowpia) ■ frond linear, nar- 

 row, tapering to cither extremity, irregularly once or twice 

 pinnated ; pinnss fleiuous, patent, contracted at the : 

 and attenuated towards the apex, A g. s L >. Ala. r. I, p. 224 

 (Atlas, PI. \ L. Fig. L86.) 



Grateloupia porracea, Kite. Delesseria filicina, Lamour. Geli- 

 dium neglectum, Bory. Fucus fiheinus, Wulf. 



Hob, South of England. On submarine rocks at half-tide level, 

 frequently where -mall Btreamlets run into the sea. \ 



rare. Perennial. Winter. 



The gi \b G pia contains several Bpecies, all <ji' 



