BRITISH ZOOPHYTES. 237 



Flustra cliartacea {Tart., Stew., Bosc, Laiiix., 11. Q.G., 

 G. J., D. L.), Chartella papyracea (Gray). 



Hab. : Coast of Sussex (Ellis), Brighton (Lister), 

 Plymouth, Ilfracombe (T.H.). 



This species is described by ElHs and Solander 

 (N.H.Z.,13), under the name of the "Paper Sea Mat," 

 as like paper with cells on both sides, having the tops 

 of its branches formed like the edge of an axe. This 

 sea mat is of a slender and delicate texture, like thin 

 semi-transparent paper of a very light straw colour." 

 F. papyracea is much smaller and more delicate than 

 the preceding species, growing to the height of about 

 1| inches. The cells have 07ie spine at each corner of 

 the upper end. 



3. F. SECUEiPRONS, Pallas. 



Eschara foliacea /3 (Linn.), E. securifrons (Pall.), 

 Flustra truncata (Linn., Lamk., Mull., JS. and 8., Lamx., 

 Flem., G. J., Grant, Hogg, B. Q. C., D. L., McA.), F. 

 papyracea (Dal.), Chartella securifrons (Gray), F. tron- 

 quee (De B.). 



Hab. : Common on the shores of Scotland and 

 northern shores of England. 



This species grows to a height of 4 or 5 inches, and 

 is as much as 3 inches in breadth. It is divided into a 

 large number of narrow segments, from the edges of 

 which " leaflets " often spring. The cells are oblong, 

 and have no spines. Ellis gave it the name of the 

 "Narrow-leaved Hornwrack," to distinguish it from 

 F. foliacea. 



4, F. Barleei, BusTc. 

 Hab. : Shetland (Norman). 



"This species has large rectangular cells, with no 

 spines. When dry it has a varnished appearance." 



