MARINE POLYZOA. 57 



v. 335 ; Johnst. Trans. Newc. Soc. ii. 265. pi. 9. fig. 5 ; Lister, 



Phil. Trans. 1834, 384. pi. 12. fig. 2 ; Templeton, Mag. Nat. 



Hist. ix. 469. 

 Membranipora pilosa, Johnst. Brit. Zooph. 280. pi. 34. figs. 10-12; 



Couch, Corn. Faun. iii. 119; Van Beneden, Recherch.53.figs. 



1-10; Johnst. Hist. Brit. Zooph. ed. 2. 327. t. 56. fig. 6. 

 Flustra dentata, Ellis and Soland. Zooph. 15 ; Turt. Brit. Faun. 



209 ; Lamk. Hist. Anim. s. Vert. ii. 158, ed. 2. ii. 224 ; Tern- 



pleton, Mag. Nat. Hist. ix. 469. 

 Flustra lineata, Esper, Pflanz. Flust. t. 6 (? not good). 

 Membranipora pilosa, Farre, Phil. Trans. 1837, 412. t. 27. figs. 



15. 



Membranipora pilosa var. /3, Johnst. Brit. Zooph. 327. 

 Eschara miUepora, Ellis, Corall. t. 29. fig. D ; Ellis, Phil. Trans. 



abridg. x. 492. t. 12. fig. 4 D. 

 Membranipora stellata, W. Thompson, Ann. Nat. Hist. v. 101 ; 



Hassall, Ann. Nat. Hist. vii. 369. 

 Annulipora pilosa, Gray, List Brit. Rad. p. 107. 

 Annulipora dentata, Gray, List Brit. Rad. p. 107. 

 Hab. European Seas ; on Laminariae and many other sea-weeds, 



very common. 



When encrusting very slender fuci, it much resembles the 

 Electra verticillata of Lamouroux, H. d. Polypes, p. 120; and 

 is F. pilosa, var. y. reaumuriana of Moll. (I. c. p. 46. fig. 6 A-H). 



3. MEMBRANIPORA CORIACEA. PI. LXXIII. figs. 4, 5. 



Front of cells broadly elliptical ; margin elevated into a small 

 tuberosity on each side of the base of the mouth. Anterior sur- 

 face punctate. Ovicells with a projection in front. 



Flustra coriacea, Esper, Pflanz. Flust. t. 7. fig. 2 ; Johnst. Hist. 



Brit. Zooph. ed. 2. p. 349. t. 56. fig. 8. 

 Discopora coriacea, Lamk. Hist. ed. 2. ii. 251 ; Lamx. Encyc. 



255; Blainv. Diet. Sc. Nat. Ix. 411 ; Man. Act. 446. 

 Micropora coriacea, Gray, List Brit. Rad. p. 115. 

 Hab, European Seas; encrusting shells. 



4. MEMBRANIPORA UMBONATA. PI. LXXIII. figs. 6, 7- 



Front of cell broadly elliptical; margin scarcely raised. A 

 spine on each side of the mouth. A projecting avicularium on 

 the front of the cell. 



Hab. Van Diemen's Land ; on fucus. Mrs. Smith, from W. 

 Thompson. 



The very prominent umbonate avicularium on the front of the 

 cell suffices to distinguish this species of Membranipora. The 



