104 
BRITISH RADIATA. 
2. Flustra membranacea. 
Flustra membranacea, Linn. Syst. 1.101 ; Fabr.Faun. Groenl.437 ; 
Mull. Zool. Dan. Prod. 253; Ellis and Soland. Zooph. 18; 
Flem. Brit. Anim. 536 ; Johnst. Trans. Newc. Soc. ii. 265 ; 
Blainv. Actinol. 450 ; Couch, Zooph. Cornw. 55 ; Corn. Faun. 
iii. 123. pi. 21. fig. 2 ; Johnst. Hist. Brit. Zooph. ed. 2. p. 348. 
t. 66. figs. 1,2, 3. 
FI. telacea, Lamk. Anim. s. Vert. ed. 2. ii. 223; Grant, loc. 
cit. iii. 111. 
Membranipora membranacea, Blainv. Actinol. 447 • 
a, b, c, d, e. On Fucus. Berwick Bay. Presented by G. 
Johnston, M.D. 
f. On Gigastina. “ Ayrshire, Rev. D. Landsborough.” Pre- 
sented by G. Johnston, M.D. 
g. On Fucus vesiculosus. Presented by G. Johnston, M.D. 
h. Patch on Fucus. Holy Island. Presented by G. John- 
ston, M.D. 
2. Chartella. 
Flustra, sp. Linn . ; Johnst. Brit. Zooph. ed. 2. p. 343. 
Chartella, Gray, Appendix and Proc. Zool. Soc. 1848. 
1. Chartella papyracea. 
Eschara papyracea utrinque cellifera, summitatibus securis aciei 
instar truncatis, Ellis, Corail. pi. 38. fig. 8. 
Flustra papyracea, Ellis and Soland. Zooph. 13; Flem. Brit. 
Anim. 535 ; Lister, Phil. Trans. 1834, 384. pi. 12. fig. 3 ; 
Milne-Edwards, Lam. Anim. s. Vert. ed. 2. ii. 220 ; Blainv. 
Diet. Sci. Nat. lx. 415. 
F. chartacea, Turt. Gmel. iv. 663; Tart. Brit. Faun. 209 ; Stew. 
Elem. ii. 436; Couch, Corn. Faun. iii. 121; Johnst. Hist. 
Brit. Zooph. ed. 2. p. 343. t. 60. figs. 5, 6 ; Lamx. Pol. Flex. 
104. 
a, b, c, d. Dry. Blackrock, Dublin. Presented by G. 
Johnston, M.D. 
e,f. Dry. Hastings, Sussex. Presented by G. Johnston, 
M.D. 
2. Chartella securifrons. 
Fucus marinus scruposus, Raii Syn. 43. no. 10; Morris, Hist. 
Plant. Oxon. iii. 546. t. 1. fig. 1/ (opt.). 
Narrow-leaved Hornwrack, Ellis, Corail. 69. no. 1. 1.28. fig. 1. a, 
A, B. 
Eschara foliacea 13, Linn. Syst. ed. 10. 804. 
E. securifrons, Pall. Elench. 56. 
* 
