56 MARINE POLYZOA. 



1. MEMBRANIPORA. 



Polyzoary encrusting or suberect, foliaceous and contorted, 

 spreading irregularly. Cells more or less irregularly disposed 

 or quincuncial, with raised margins ; a greater or less extent of 

 the front membranaceous and flexible. 



Eschara (part.), Pallas, Blench. 



Flustra, Linn., Muller, Esper, Berkeley, Lamarck (part.), Grant, 

 Fleming (part.), Risso, Johnston, Transact. Newc. Soc. ii. 



Lamouroux, Hist. d. Pol. p. 96 (part.). 

 Membranipora, Johnston, B. Z. ; W. Thompson; Hassall. 

 Discopora (part.), Lamarck, An. s. V. ii. 248, 1836. 

 Annulipora, Gray, App. B. R. 

 Conopeum, Gray, App. B. R. 

 Callopora, Gray, App. B. R. 

 Amphiblestrum, Gray, App. B. R. 

 Micropora, Gray, App. B. R. 



1. MEMBRANIPORA MEMBRANACEA. PL LXVIII. fig. 2. 

 Cells oblong, with a short blunt spine at each upper angle. 



Flustra membranacea, Linn. Syst. 1301 ; Fabric. Faun. Gr&nl, 



437 ; Muller, Zool. Dan. Prod. 253; Ellis fy Soland. Zooph. 



18 ; Fleming, Brit. Anim. 536 ; Johnston in Trans. Newc. Soc. 



ii. 265 ; Blainville, Actinol. 450 ; Couch, Zooph. Cornw. 55 ; 



Corn. Faun. iii. pi. 21. fig. 2 ; 0. Fabr. Faun. Graml. p. 437- 



n. 446. 

 Flustra telacea, Lam. Anim. s. Vert. ed. 2. ii. 223 (not F. memb. 



p. 225). 



Membranipora membranacea, Blainv. Actin. 447. 

 Hab. European Seas : common, spreading on fucus, sometimes 



suberect or free. 



2. MEMBRANIPORA PILOSA. PI. LXXI. 



Cell prolonged below. A movable spine or vibraculum below 

 the lower margin of the aperture, sometimes aborted ; an irre- 

 gular number of marginal spines. Wall of cell cribriform. 



Irregular spongy foliaceous Coralline, Ellis, Corall. 73. no. 4. 



pi. 31. 

 Eschara pilosa, Pallas, Elench. 50; Moll, Seerinde, p. 41. pi. 1 



& 2. figs. 5 & 6. 

 Flustra pilosa, Linn. Syst. 1301 ; Mull. Zool. Dan. Prod. 253 ; 



Ellis and Soland. Zooph. 13; Esper, Pflanz. Flust. t. 4. figs. 



1, 2 ; Berk. Syn. i. 214 ; Lamk. Anim. s. Vert. ii. 159, ed. 2. ii. 



224 ; Blainv. Diet. Sc. Nat. Ix. 415 ; Grant, Edin. New Phil. 



Journ. iii. Ill; Flem. Brit. Anim. 537 ; Risso, L'Europ. Merid. 



