86 ACOTYLEDONS. ALG;E, Ceramium. 



Scarcely a quarter of an inch in height, spreading in rather large 

 patches like crimson velvet. The fructification is unknown, but the 

 habit and place of growth bespeak it a Ceramium, 



*** Brownish or orange-coloured. 



7. C. tomentosum, filaments very much branched extremely slen- 

 der intricate collected into long almost spongy fascicles, 

 branches divaricating, articulations about 4 times as long as 

 they are broad. Ag. p. 64. Conferva tomentos^ Lightf. 

 p. 982. Dillw. Conf. t. 56. 



HAB. Marine rocks on the western coast, frequent, generally adhering 1 



to the larger Fuci, Lightf. 

 Two to four inches long, brown. Agardh has observed long pods with 



seeds like those of C. siliculosum. 



8. C. littorale, filaments very slender very much branched col- 

 lected into numerous long fascicles, branches erect acuminate, 

 articulations as long as they are broad. Ag. p. 65. Conferva 

 littoralis, E. B. t. 2290. Dillw. Conf. t. 31. 



HAB. Rocks and Fuci, abundant. 



Four to six inches long, soft. Mr. Dillwyn has observed sphserical 



sessile capsules mid swelling articulations apparently filled withgra- 



nules at the extremities of some of the branches. 



9. C. siliculosum, filaments very slender free, branches alternate 

 subulate erect, articulations as broad as they are long, cap- 

 sules pod-shaped with scattered seeds. Ag. p. 65. Conferva 

 siliculosa, Dillw. t. E. E. B. t. 2319. 



HAB. Upon Fuci on the Moray coast, Mr. Borrer and Hook. 

 Much smaller, slenderer, and paler than the last ; and never collected 

 into fasciculated, dense brar^hes, as is the case in the two last. 



10. C. drrosum, branches pinnate, pinnules distichous nearly 

 opposite subhorizontal approximate straight almost pectinate, 

 articulations as long as they are broad. Ag. p. 67. Conferva 

 pennata, Dillw. Conf. t. 86. E.B. t. 2330. 



HAB. Rocks and on Fuci, coast of Moray, James Brodie, of Brodic, 

 Esq. South Queen'sferry and Dunbar, Mr. Borrer and Hook. 

 Firth of Forth, near Kirkcaldy, Mr. Greville. 



One to two inches long, rigid, olive brown, fasciculate, dense. Cap- 

 sules ovate, sessile or pedunculate. 



1 1 . C. scoparium, filaments very much branched rigid, branches 

 fasciculate erecto-patent ultimate ones subulate alternate dis- 

 tichous, articulations about as long as they are broad. Con- 

 ferva scoparia, E. B. t. 1552. Dillw. Conf. t. 52. Lightf. 

 p. 981. 



HAB. Rocks and Fuci, plentiful. 



Two to four inches long, densely fascicled, darkish.brown, rigW- Cap- 

 sules -at the extremities of the branches, according to Snr'th. 



12. C. aureum, filaments flexuose collected into a Jense soft 

 pulvinate fine orange-coloured tuft, branches elongate patent 



