Sm. nO\OYLOS?ETll\rE.E. ( 91 ) Fam. CERAMIACEJE. 



CEPvAMIUM BOTRYOCARPUM.- Griff. 



Gkn. Char. — Frond filiform, single tubed, articulated ; joints, and occasionally more or 

 less of the articulation, pervaded by coloured cells. Fructification of two kinds, on 

 distinct plants : 1. Favelte, roundish, with a pellucid limbus, and generally sur- 

 rounded at the base by an involucre of few short articulated spine-like ramuli ; 

 2. Tetraspores, more or less immersed in the ultimate ramuli. Name from 

 Kepa/uLos, "a pitcher ; " but the name is not applicable to the fruit of any species 

 of the genus as now restricted. 



Ceramium Botryocarpum. — Griff, in Herh. ; Harv. Phijc. Gen. in list of species, 

 vol. i. plate 11 ; Harv. P. B, plate 215 ; Ilarv. Man. p. 161 ; Harv. 

 Syn. p. 131 ; Atlas, plate 53, fig. 243. 



Ceramium ruhrum, y i:>7'oUferum. — Harv, N. B. A. part 2, p. 214; /. G. Ayardh, 

 Sp. Gen. Ahj. vol. ii. p. 127. 



Hab. — On rocks and Algae between tide-marks. Annual ? Summer. Discovered on 

 Preston Rocks, Torquay {Miss Amelia A, Griffiths, 1844). Not uncommon ? 



Geogr. Dist. ? 



Descriptiox. — Root, a small conical disc, " with imperfect fibres." 

 Fronds two to five inches long, one-sixth of a line in thickness, much 

 branched dichotomously ; branches filiform, and nearly of equal thickness, 

 tapering tipwai'ds to a fine point, and everywhere more or less beset 

 with short, mostly fiisifonn ramuli, which are generally simple, rarely 

 forked, and occasionally become converted into multifid branchlets ; the 

 ramuli are inserted veiy hregularly round the stem, and are occasionally 

 straight, but more frequently curved upwards, and are generally much 

 attenuated to the base, and taper to a rather blunt point ; lower articu- 

 lations one and a-half or twice as long as broad, becoming shorter 

 upwards, those of the ramuli scarcely so long as broad; dissepiments 

 constricted. Substance somewhat cartilaginous, adhering rather im- 

 perfectly to paper. Colour, rather dark dull brownish red, the older 

 parts frequently greenish, changing to yellowish or greenish white in 

 decay. Favellse we have not seen ; they are described as forming naked 

 masses on the ramuli, mostly without involucral spines, although these 

 are described by Dr. Harvey as being occasionally present. Tetraspores 

 are common, and are immersed in the articulations, in which they form a 

 ring as in C. t^hrum. 



We must candidly acknowledge that we are not very sanguine as to 



