ACOTYLEDONS. ALG^E. Ceramium. 85 



luerated. Ag.p.M. Conferva rulra, E. B. t. 1166. Conf. 

 nodulosa, Light/, p. 994. 



HAB. Common on rocks, stones, and sea-weeds, on the shores. 



From 4 8 inches long. Involucres of from 2 4 setaceous, incurved, 

 simple branchlets. A var. of this, as it is considered by Mr. Dillwyn, 

 is published by that gentleman, having seeds scattered in the ulti- 

 mate ramuli, and the articulations with a dark spot in the centre, 

 pellucid near the joints. 



2. C. diapkanum, filaments dichotomous very much branched 

 submembranaceous alternately marked with reddish purple 

 and white pellucid rings, branchlets forcipate the joints swol- 

 len, capsules globose lateral involucrated. Ag. p. 61. Con- 

 ferva diaphana, E. B. t. 1742. 



HAB. Rocky shores, frequent, Light/., Mr. Greville. 

 Much smaller than the last, and vastly more delicate. 



3. C. ciliatum, filaments dichotomous much branched membra- 

 naceous, articulations opaque at the joints which are beset 

 with whorled bristles, branchlets remarkably forcipate, cap- 

 sules globose lateral involucrated. Conferva ciliala, Lightf. 

 p. 998. E. B. t. 2428. 



HAB. Upon the western coast, entangled among the branches of Fu- 



cus plicatus, Lightf. 

 Still smaller and more delicate than the last. May not this be the 



younger and C. diaphanum the intermediate state of C. rubrum ? 



** Reddish. Capsules naked, subsessile, inserted upon the extremity 

 of the articulations. 



4. C. roseum, filaments extremely slender repeatedly branched 

 membranaceous, branches and branchlets alternate very much 

 crowded, joints somewhat contracted, articulations about thrice 

 as long as broad, capsules secund. Ag. p. 62. Conferva ro- 

 sea, E. B. t. 966. 



HAB. In the Firth of Forth, near Kirkcaldy, Mr. Greville. 

 A very elegant species, of a purplish rose-colour. Capsules upon the 

 ultimate branches. 



5. C. Hoo&m, filaments very much branched, the primary ones 

 without joints, branchlets pinnate slender flexuose scattered 

 pale reddish brown, pinnules alternate jointed, articulations 

 half as long again as broad. Dillw. t. 106 (Conferva Hookeri). 



HAB. Rocks in the sea at Cawsie, Morayshire, Mr. Borrer and Hook. 



Two to four inches long, very gelatinous when fresh, and adhering 



firmly to paper in drying. 



6C. Rothii, filaments erect dichotomous short very densely caes- 

 Kkose crimson, branches alternate, articulations thrice as long 

 as U-oad. Conferva Rothii, Dillw. Conf. t. 73. 



HAB. Rv;ks upon the coast of Durness, Sutherland ; -and in the island 

 of PapX^estra, Orkney, Mr. Borrer and Hook. Rocks by the sea* 

 shore ut i ie mouth of the Firth of Forth, Mr. Gr-eville. 



