MARINE POLYZOA. 93 



cells, scattered irregularly over it, and which if multiplied, as 

 under circumstances it is quite conceivable they might be, would 

 afford the heaped or confused aspect and structure of the genus 

 Cellepora, and make it accord with figs. 4 & 5 of Dr. Johnston's 

 plate. The genus requires further research. 



2. RETEPORA. 



Polyzoarium foliaceous, calcareous, reticulated. Cells im- 

 mersed, opening on one surface only. 



Millepora, Linn, (part.) ; Ellis 8f Solander ; Esper ; Marsiali, 



Hist. ; Cuvier, Regn. Animal (spec.). 

 Retepora, Imperato, Hist. Nat. ; Lamarck, ii. 274 ; Risso, 



L' Europe Merid. ; Flem. Brit. An. ; Stark, Elem. ii. ; Elaine. 



Actin. ; Couch, Corn. Faun. ; Johnst. Brit. Zooph. i. 353 ; 



Goldfuss (part.) ; Hagenow (part.). 

 ?Frondipora, Oken, Lehrb. 63, 1815; Blainville, M. d'Actino- 



loaie. 



1. RETEPORA CELLULOSA. PL CXXI. figs. 3-8. PL CXXIII. 

 figs. 5 } 6. 



Polyzoarium turbinate or crateriform, undulated, curled, rising, 

 with a sort of peduncle. Cells subcylindrical ; a prominent ros- 

 trum in front of the mouth, having a minute avicularium on one 

 side at the base ; a marginal spine on each side of the mouth ; 

 scattered avicularia of various sizes and forms dispersed over the 

 polyzoarium. 

 * Stony Eschara ' of Imperatus ( full of holes like a net,' Ellis, 



Corall. p. 72. pi. 25 d, D, F. 

 Retepora eschara marina, Imperato, Hist. Nat. p. 630 (cited by 



sms). 



? Millepora cellulosa, Jameson, Wern. Mem. i. 560 ; Turt. Brit. 



Faun. 205 ; Stew. Elem. ii. 427 ; Cavolini, Pol. Mar. p. 64. 



pi. 3. figs. 12 & 13. 



Millepora foraminosa, Ellis fy Soland. Zooph. 138. pi. 26. fig. 2. 

 Frondipora cellulosa, Oken, Lehrb. Nat. 63. 

 Millepora Retepora, Borl. Cornw. 240. pi. 24. fig. 8; Pallas, 



Elench. p. 243. 

 Retepora reticulata, Johnst. Hist. Brit. Zooph. ed. 2. p. 353 ; 



Couch, Corn. Faun. iii. 130. 



? Frondipora reticulata, Blainv. ibid. 406. pi. 69. fig. 1. 

 ? Frondipora clathrata, Oken, Lehrb. Nat. 64. 

 Manchette de Neptune, Daubenton, Ic. t. 23. 



