334 ALG.E CONFERVOIDEiE. [Dasya. 



21. P. elongella, {small Lobster-horn Polysiphonia) ; filaments 

 cartilaginous subdichotomous, axils patent, ramuli flaccid sub- 

 fasciculate elongated not tapered at the base, articulations of 

 the branches as long as broad marked with three parallel veins. 



At Sidmouth, Mrs. Griffiths and Miss Cutler. — Filaments 2 — 3 inches 

 high, in the lower part cartilaginous and as thick as hog's bristles, at- 

 tenuated upwards to a capillary fineness ; main branches subdistant, 

 very patent or divaricated, ramuli rather crowded, in some plants peni- 

 cellate, straight, dichotomous, slightly tapering towards the apex, not at 

 all so towards the base : axils patent. Articulations visible in all the 

 main branches, obscure near the root : veins all parallel. Colour below 

 brownish, on the upper part rose-red. Capsules large, broadly ovate, 

 sessile or shortly pedunculate, scattered on the upper rarnuli, containing 

 a tuft of pyriform seeds. Granules in distorted ramuli also occur. The 

 capsules are extremely rare. To the naked eye this species precisely 

 resembles a small specimen of P. ehngata ; but under the microscope the 

 two are seen to be abundantly different. 



22. P. byssoides, Grev. (byssoid Polysiphonia); filaments 

 cartilaginous, branches decomposito-pinnate alternate patent 

 crowded, ramuli capillary multifid single-tubed byssoid, articu- 

 lations of the stem 3 — 4-striate 2 — 4 times as long as broad. — 

 Conferva byssoides, E. Bot.t. 547. Dillw. Conf. t. 58. — Hut- 

 chinsia byssoides, Ag. Sp. Alg. v. 2. p. 99. 



South and east of England, and easl of Ireland, abundantly : very 

 rare in Scotland or west of Ireland. Firth of Forth, Dr. Richardson. — 

 A beautiful species, of a fine red colour, which, however, fades to dull 

 brown in the herbarium ; easily distinguished by the delicate, single- 

 tubed, dichotomous fibres, which thickly clothe each joint of the penul- 

 timate branchlets. 



23. V . fibrill'osa, (fihrillose Polysiphonia); "filaments much 

 branched veiny red, branches and ramuli scattered, the ultimate 

 short multifid fibrilliform, lower articulations long upper short." 

 Dillw. Syn. Conf. p. 86. t. G. — Hutchinsiafibrillosa, Ag. Sp. Alg. 

 v. 2. p. 78. 



At Brighton and Shoreham, Mr. Borrer. At Seaton, Mrs. Griffiths. 

 Bantry Bay, Miss Hutchins. — This I have never seen in a recent state ; 

 but Mr. Borrer, its discoverer, makes the following remarks from fresh 

 specimens. — " Very nearly allied to Conferva byssoides, but diffusely and 

 irregularly branched, the main stem and primary branches as thick as 

 in C. rubra ; the joints of the secondary branches rather shorter in pro- 

 portion to their diameter ; capsules mostly on short stalks. The ulti- 

 mate ramuli are very fine and tufted, like those of that species ; but less 

 numerous,more repeatedly dichotomous and less elongated at the points. 

 Substance of the whole plant remarkably fragile, tender and subgela- 

 tinous. Colour pale rose-red, with a brownish tinge, becoming much 

 darker in drying and in decay."— (Borr. MS.) 



60. Dasya. Ag. Dasya. 



Main filaments inarticulate, cartilaginous, beset with articu- 

 lated penicellate or pinnate ramuli. Fructification double : — 1. 

 conico-acuminate capsules, furnished with a terminal pore : 2. 



