Flustra. Z. ASCIDIOIDA. 285 



colour It was first found on the coast of Sussex, adhering to s 



shell. I have since met, on the same coast, about Hastings, in the 

 year 1763, with several specimens, whose tops were digitated, and 

 others that were very irregularly divided." Ellis. 



As this is very certainly distinct from the F. papyracea of Linnaeus, 

 I have preferred the name of Gmelin. Dr Fleming seems inclined 

 to consider the species as a variety of the preceding. For my own 

 part I know not how it is to be distinguished from that which follows. 



3. F. TRUNCATA, cells Unear-oblong , with smooth margins. 



Plate xxxv. Fig. 3, 4. 

 Fucus marinus scruposus albidus augustior compressus, extiemitatibus quasi 



abscissis, Rail, Syn. 43, no. 10. Morris. Hist. Plant. Oxoii. iii. 646, 



tab. 8, fig. 17, opt Narrow leaved Horiiwrack, Ellis, Coral. 69, no. 



l,tab.28,fig. 1, a. A, B Escliara foliacea /3, Zan. Syst edit. 10,804. 



E. securifrons, Pall. Elench. 56. Flustra truncata, Lin. Syst. 



1300. Mull. Zool. Dan. prod. 253. Ellis and Soland. Zooph. 11. 



Berk. Syn. i. 214. Turt. Gmel. iv. 663. Warn. Mem. i. 563. Turt. 



Brit. Faun. 209. Stew. Elem. ii. 436. Lam. Anim. s. Vert. ii. 157. 



2deedit. ii 219- Corall. 44. Bosc, Vers, iii. 140. pi. .30, fig. 1. Risso, 



L'Europ. Mend. v. 334. Grant, in loc cit. ill. Flem. Brit. Anim. 



535. Hogg's Stock. 36. Johnston in Trans. Newc. See. ii. 264. pi. 



12, fig. 1. Templeton in Mig. Nat. Hist. ix. 469 La Flustre tron- 



quee, Blainv. Actinolog. 450 

 Hab. In deep water, very common. 



Attains a height of four or five inches, very bushy, of a straw-co- 

 lour, smooth, varnished when dry, rather thin in texture, origina- 

 ting from a matted base formed of capillary fibres, which, by their 

 union, compose a short stem that divides, after a dichotomous man- 

 ner, into numerous flat narrowish segments, either linear or dilated 

 upwards. From the edges of these there often sprout out wedge- 

 shaped leaflets, affixed by a small pedicle, simple at first, but after- 

 wards deeply bifid : the ends of all the segments are abruptly trun- 

 cate. Cells linear-oblong, their septa unarmed, usually marked with 

 a black dot towards the centre, which seems to be the remains of 

 the shrivelled polype, and at some seasons covered with a hood-like 

 operculum. 



* * Foliaceous, with cells on one side only. 



4. F. CARBASEA, Cells oblong^ narrorced and truncate below, the 

 margin toothless. Dr Skene. 



Plate xxxvi. Fig. 1, 2. 



Flustra carbasea, Ellis and Soland. Zooph. 14, pi. 3, fig. 6, 7. Turt. 



Gmet. iv. 663. Wern. Mem. i. 563. Turt. Brit. Faun. 209. Stew. 



Elem. ii. 436. Lam. Anim. s. Vert. ii. 157. 2de edit. ii. 221. Boscy 



