296 DR. LILY BATTEN ON 
8. P. supULIFERA (Av.) Harv. in Hooker’s Journal of Botany, vol. i. 1834, 
p. 301. 
Hutchinsia subulifera C. A. Ag. in Bot. Zeit. 1827, p. 638. 
P. armata J. G. Ag. Alg. Mar. Medit. et Adriat. 1842, p. 810. 
P. pantophlea Kütz. Tab. Phye. xiv. 1864, p. 5, tab. 13 (a-e). 
P. ramellosa Kütz. l. e. p. 9, tab. 26 (a-b). 
References —Agardh (2) ii. p. 1052; Cotton (16) p. 139; Crouan (17) 
ii. p. 311 ; De Toni (22) iv. p. 936: Harvey (28) pl. 228.; Kützing (37) iv. 
p. 936. 
Icones. Harvey, Phye. Brit. pl. 227. syn. 124; Kützing, Tab. Phye. l. c. 
vesiccate. Crouan, Alg. mar. Finist. no. 311, 1852. Lloyd, Ouest Fr. 
no. 278, 1854. Wyatt, Alg. Damnon. no. 178. 
DzscuirrIoN.— 77abit. The species is an annual, appearing in summer and 
growing to a length of 8 inches under favourable conditions. Occurring 
in tufts, branched from the base and beset with alternate short spine-like 
ramuli, the tips clothed with clusters of almost colourless filaments when 
the plant is young. Stphons. 12-13 pericentral round a central one of 
diameter equal to about 4 of the radius of the filament. Colour. Deep red 
when fresh, but becoming dark when gathered. Anatomy. Articulations 
varying in length from 2-3 times their breadth in the main branches to a 
length equal to their breadth in the smaller branches and ramuli. Attach- 
ment organ, Attached by rhizoids developed from pericentral siphons of 
procumbent branches. Reproductive organs. Tetraspores borne in distorted 
ramuli. Antheridia and cystocarps unknown. 
The species is rigid when fresh, but soon becomes flaccid when gathered. 
It is usually only obtainable by dredging in from 4-10 fathoms of water, and 
examination of complete attachment organs proved impossible. It is a 
characteristic feature that the ramuli are short and spine-like, comparable to 
those of P. fruticulosa, from which it differs in the ecorticate form of the 
main axis. From P. simulans it is distinguished by larger size and lighter 
colour and difference in habitat, ag it is rarely, if ever, found in the tide- 
pools at low water. 
Habitat. Occurring in deep water, generally on Nullipore banks. Reeorded 
from Jersey attached to Aytiphlea pinastroides and Polyides rotundus, and 
from Roundstone (Cotton, Sept. 1911) on the Lithothamnion banks. 
British Records. Weymouth, Torbay, Lamlash, Arran, Belfast, Carrick- 
fergus, Roundstone Bay, Jersey, and Guernsey. Very rare. 
Distribution in Europe. Adriatic Sea and coast of France. 
