of Norway and Finmark!^"^- ^ -^ 35 



Mediterranean. But comparison of the specimens collected by 

 Mr. M ^Andrew, and of others in my possession collected by 

 Capt. Beaufort in lat. 61° 35' N., long. 90° 42' W., with nume- 

 rous and excellent specimens collected on the coast of Patagonia 

 by Mr. Darwin, and of Australia by Mr. M'Gillivray, has fully 

 satisfied me that the northern and southern forms are perfectly 

 distinct. I suspect also that it will be found that the Mediter- 

 ranean locality belongs to a third, distinct species, should the 

 latter retain a place in the genus Hornera at all. 



2. Fam. DiscopoRAD^, Busk {Engl. Cyclopedia, Art." Poly zoa'^J^^ 

 jv : 1. Diastopora (simplex), M.-Ed. (Sur les Crisies, &c.). 



K' •/). obelia, Johnst. Brit. Zooph. 2nd edit. vol. i. p. 276. pi. 47. 

 ^^ figs. 7, 8. - - -'-9 



Tubulipora obelia, Couch, Corn. Faun. p. 108; Johnst. Bnt. 

 Zooph. p. 269. pi. 30. figs. 7, 8 ; Thompson, Ann. Nat. Hist. 

 V. 252. 



'I have preferred the affix of M.-Edwards's name to the genus, 

 although the term Diastopora was first employed by Lamouroux. 

 The clear definition of the genus by the former plainly entitles 

 him to the preference. The Berenicea of I^amouroux, as observed 

 by M^- Edwards, should certainly be referred to the same genus. 



fijiko(>V-.<. 0. ^: TubuUpora, Lamarck. ,:^-^^ ^^^ ^^^f 

 1.J T. nispida, Fleming. - - ». . .. 



T. hispida, Johnst. Brit. Zooph. 2nd edit. vol. i. p. 268. pi. 47. 



figs. 9, 10, 11. 

 Discopora hispida, Fleming, Brit. Anim. 530 ; Couch, Corn. Faun. 



109. pi. 19. fig. 1 ? (very bad). 



3. Defrancia, Bronn (1825). Defranceia (1846), Reuss, Fossil. 



Polypar. d. W. Tertiarb. 

 Pelagia, Lamx. 

 Lichenopora, Michelin. 

 Tubulipora (pars), M.-Ed. 

 Ceriopora (pars), auctor. 



Of this genus numerous fossil forms exist in the cretaceous 

 and tertiary formations, and several living species appear to have 

 been noticed. Of the two here described, one is already known 

 as hving, and the other only as fossil in the marl (Mergelgrund) 

 of Essen, and in the tertiary beds of Vienna. 



a. Interstices of costm porous. .h\ ^"^ 



1. D. truncata, Jameson. PI. I. fig. 8. .^nr^iiijool .jdT 



Polyzoary fungiform, simple ; centre of upper surface of disk 



3* 



