94 MARINE POLYZOA. 



Retepora cellulosa, Lamouroux, Exp. Meth. des Polyp, p. 41. 

 pi. 26. fig. 2 ; Deslong champs, Encyclop. Zooph. p. 669 ; 

 Cuvier,Regne Anim. ed.2. iii. 316 ; Schweigger, Handb. p. 431; 

 Blainv. Man. d'Actin. p. 433. pi. 76. fig. 1 ; ? Reuss, Fossil 

 Polyp, d. Wien. Tertiar-Beckens, p. 47. pi. 6. fig. 34. 



? Retepora frustulata, Lamarck, 1. c. p. 279. 



? Retepora vibicata, Goldfuss, Pet. Germ. i. 103. t. 36. fig. 16. 



Hob. Mediterranean. Britain ? Cape Horn, 40 fathoms, Dar- 

 win. Australian Seas (a more slender variety?), Macgillivray . 



2. RETEPORA BEANIANA. PL CXXIII. figs. 1-5. 



Polyzoarium infundibuliform, wavy, on a short peduncle. 

 Cells sub cylindrical ; a prominent rostrum in front of the mouth, 

 on the point of which is a semicircular avicularium, and from 

 which a slightly raised keel descends upon the front of the cell, 

 which therefore appears to be hollowed on the sides ; a spine on 

 each side of the mouth. 



Millepora cellulosa, Jameson in Wern. Mem. i. 560; Turton, 



Brit. Fauna, 205 ; Stew. Elem. ii. 427. 

 Retepora cellulosa, Johnst. in Loud. Mag. Nat. Hist. vii. 638. 



fig. 69; S. V. Wood, Ann. fy Mag. Nat. Hist. xiii. 16; W. 



Thompson, ibid. xv. 322. 

 ? Retepora beaniana, King in Ann. fy Mag. Nat. Hist, xviii. 237 ; 



Landsborough, Pop. Hist. Brit. Zooph. p. . pi. . fig. 

 Hob. Shetland Islands and in the Island of Fulah, Jameson. 



Scarborough, W. Bean. ? Cape Clear, Ireland, Prof. Allman. 



Orkneys, E. Forbes, Barlee. Deep water off the coast of 



Northumberland, W. King. 



The very minute difference between the two foregoing species, 

 unless proved to be constant, is hardly sufficient to render them 

 distinct; and although I have here so arranged them, I am by no 

 means satisfied that it is correct. There is a considerable dif- 

 ference in the habit of the Australian form, but very close in- 

 vestigation has failed in my hands to establish any other definable 

 distinction. The figure, of the natural size, here given, is taken 

 from a magnificent specimen taken in Embleton Bay, Northum- 

 berland, and in the possession of Mr. Alder. 



3. RETEPORA PHCENICEA, n. s. ? PL CXXI. figs. 1, 2. 



Polyzoary foliaceous, expanded, much convoluted. Cells 

 ovate, ventricose ; mouth raised, circular, sometimes subtubular, 

 entire or irregularly serrated ; cells where immersed bordered by 

 a raised line ; many cells with an avicularium placed obliquely 

 on the front, just below the mouth ; mandible very wide at the 



