Conferva-] ALG/E CONFERVOIDE.E. 353 



ca/a, Grev. Crypt. Edin. p. 315. — Ban gin Jolinstoni, Grev. in 

 Johnst. Berw. Fl. p. 260, (according to original specimens.) 



On marine rocks. Bantry, Miss Hutching. Berwick, Dr. Johnston. 

 Firth of Forth, Dr. Greville. — Filaments half the diameter of C. tortuosa, 

 with shorter joints. I can find no characters to distinguish the C. intri- 

 cata of the Flora Fdinensis ; nor is Bangia Johmtoni in any way differ- 

 ent (as Mr. Arnott first pointed out to me) from C. implexa. 



16. C. ulothrix, Lyngb. (short-joinUd curled Conferva); "fila- 

 ments slender flexuose entangled somewhat rigid, articulations 

 rather shorter than broad." Lyngb. Hydroph. Dan. t. 50. Ag. 

 Syst. Alg. p. 98. 



In rocky pools, attached to small Algae. Appin, Captain Carmichael. 

 — " Filaments slender, curled and convoluted into a small elastic green 

 tuft. Articulations hardly so long as broad. It is the preceding species 

 in miniature, with the exceptions above stated." Carm. MSS. 



17. C. perreptans, Carm. (creeping Conferva); filaments slen- 

 der crisped entangled into dull-green strata, bent at acute angles 

 and at the genuflexion sending out attenuated creeping radicles, 

 articulations about twice as long as broad. — Zygnema littorenm, 

 Lyngb. Hydroph. Dan. t. 59. 



On rocks, at the extreme verge of high-water mark. Appin, Captain 

 Carmichael. Miltown Malbay, IV. H.Harvey. — Strata thin, dull-green : 

 filaments irregularly twisted, forming very acute angles, here and there 

 sending out tubular, indistinctly jointed, partially hyaline radicles, 

 " which adhere to particles of sand and other matters within their reach ; 

 often to a neighbouring filament." Carm. In drying, the endochrome 

 becomes contracted into a dark central cord. 



18. C. arenosa, Carm. (Strand Conferva); filaments slender 

 rigid interwoven into broad strata, articulations 3 — 5 times 

 longer than broad. 



* On the flat, sandy shore, about half-tide level, at Appin," Captain 

 Carmichael. — " This species occurs in fleeces, a yard or more in extent, 

 and of a peculiar structure. They consist of several exceedingly thin 

 layers, placed over each other; but so slightly connected that thev may 

 be separated like folds of gauze, to the extent of many inches, without 

 the least laceration. Filaments .'> — (i inches long, about the thickness of 

 C. bombycina, rigid, possessed of a peculiar roughness; feeling, when 

 polled asunder, B8 if a hair were drawn over a piece of rosin. Articula- 

 tions 'A — .) times ;is long as broad ; sporular mass assuming a great vari- 

 ed of forms. When old, the filaments become exceedingly rough and 

 often tubercular." Carm. MSS. 



d. Filaments tufted s with n scutate root, straight, green; — 



inhabiting the sea. 

 ID. ('. Miliif/nniuni. Web. el .\lohr, (///'/// Conferva); fila- 

 ments elongate scattered straight thick erect stiff and win dark- 

 green, articulations twice as long as broad — Dilhr. Conf. Syn. 



I>. -is. t. a. A, h .S,,/. Alg.p, 99. 



In the sea, in niai.\ places j bill no! \n\ common any where. — 1'ila- 

 virnts 5—8 inches high, remarkably rkid and win ; dissepiment s some- 

 what contracted) very narrow, but pellucid. 



2 \ 



