cm: am [ACBJB. 10 I 



B64. purpurascens {Thi purple Callithamnion), Smithy 

 Bot t. 2466. 

 This Bpecies, described by Smith and figured in the 

 glish Botany,' is unknown to me. 



265. fasciculatum {The fasciculate Callitl 



branches erect, flexuous, level-topped j plumules elong 

 erect, linear-obovate, truncate; pinna? long and flexu 

 the lowermosl simple, appressed, the upper erecto-patent, 

 branching toward the tip; articulations of the branches 

 veiny, thrice as long as broad, of the pinnae once or twic as 

 long as broad, with contracted dissepiments, Harv. in H 

 Br. Fl. r. 2. p. 343. (Atlas, PL LVLLT. Fig. 271.) 

 JIdh. Yarmouth. 



The testimony of the existence of this species rests i 

 a Bingle specimen preserved in the herbarium of Sir W. J. 

 Hooker, and collected early in the present century, ir 

 will be seen by my figure in tin 1 'Phycologia' that the habit, 

 to the naked eye, is that of C. corymbosum, while the mi- 

 croscopic characters are nearer those of C. JBorreri than 

 those of any other species. The diameter of the filai 

 is greater than that of the usual state of C. Borreri, and 

 much greater than that of C. rosewm, and the constricted 

 dissepiments of the ramnli are very characteristic. 



266. Borreri {Borrers Callithamnion) ; much branched, sub- 

 distichous, rigid or flaccid; branches sel with distichous 

 plumules which are bare of ramuli in their lower half 

 Bimplj pinnate in their upper; pinnae long, patent, Bubulate, 

 Bimple (or ramulose at top), the lowermost Eongesl ; articu- 

 lations < fthe branches 2-5 times, of the pinna- about twice 



mg as broad ; tetraspores roundish, sessile on the u 

 face of the puma' ; tavclia- two-lobed, near the apex of the 

 - !• branches, Ag. Sp.Alg. o. 2. p. 170. (Atlas, PL LIX. 

 Fig. 272.) 

 Callithamnion Beminudum, Ag. Ceramium pinnulatum, Ag, C. 



miniatnm, Ag. Conferva Borreri, Smith. 

 Hah. On mud-covered rocks near low-water mark. Annua!. 

 Summer. Rather rare. 

 This very handsome species, whose essential char 

 its in having the lower half of its plumules hare of 

 ramuli, while the upper is pinnated, the pinnse spreading 

 like i\\c rays of a fan. is nearly related t.» several other 

 Bpecies, especial] . C, poUf8permum t and ( . 



tripinnatum; from the two former of which it is known 



