BH0D0MELACEJE. 77 



of Biphons in each whorl. The pamification ia somewhat 

 more Lai ; the spaces of naked branch at the bases of the 

 branching portion arc Longer; the filaments are more flex- 

 nous ami flaccid, and the colour is asually paler than in 

 P. nigrescent, bul there Is such a general similarity thai I 

 could be well contented to regard it as a deep-water form 



of thai species. 



124. subulifera (The subulate Polysiphoma); filaments Beta- 

 ceous, quickly beooming flaccid, flexuous, Irregularly much 

 branched ; branches alternately decompounded, spreading, 

 tlie Lesser divisions Long and rod-like ; ramuli scattered, pa- 

 tent, Bubulate, Bimple or rarely bi-multifid; articulations 

 visible in all }>ai-t> of the iVond, variable in length, many- 

 striate; tubes aboul thirteen, containing a coloured bag, and 

 surrounding a narrow cavity, Harv. in Hook. Journ. Hot. 1st 

 Series, v. 1. p. 301. (Atlas, PI. XXIX. Fig. 129.) 



Hutchinsia Bubulifera, Ag. 



Huh. South of England, and Ireland. Dredged in four to fiveor 



ten fathoms water, generally on Nullipore banks. Annual. 



Summer. 



To the naked eye this species bears a greater resemblance 

 to young specimens of JEtytijphlcea fruticulosa than to any- 

 thing else, but is more slender and flaccid, and readily 

 known at all times by the distinctly articulate stem and 

 branches, which have, both externally and internally, a 

 very different structure. Its peculiar thorny habit, well 

 expressed by the specific name, is so unlike that of any 

 other British species oi' equal size, that it cannot well 

 be confounded with any. It appears to be abundant on 

 the coast of Ireland, especially in Roundstone Bay, where 

 on different occasions I have dredged it in considerable 

 quantities. 



125. atro-rubescens {Tim dark-red Volysiphonid) ; filaments 

 setaceous, sparingly or much branched, dark brownish-red, 

 somewhat riu r id ; branches Long, alternate, very erect, mostly 



undivided, usually furnished with a second (or third) Bel OT 



lesser branches, caked, or clothed with short, simple ormul- 



tilid, scattered, Bubulate ramuli. which taper to the hase and 



apex : articulations variable, the lower twice or thrice as Long 

 as broad, the upper gradually shorter, marked with several 

 spirally-curved tubes ; siphons about twelve ; capsules broadly 

 ovate or Bubrotund, sessile, nearly or quite terminal; tetra- 

 Bpores imbedded in mult did ramuli, (i'nr. /•'/. Ju/i/i. j>. 308. 



(Atlas, PL XXIX. Pig. 130.) 



