69. CHRYSOGORGIA. 45 



Lithoprimnoa arctica, G. Gntbe, Abh. d. schles. Ges.f. Naturw. u. Med. 

 1861, p. 165. 



Hal. North Sea; Setubal (Prof. E. P. Wright); England (Johnson). 



" Trunk large, arborescent, branching in a dichotomous manner, 

 often very thick and stony near the base ; branchlets round, tapering 

 to slender flexible points. Cells large, campanulate, irregularly 

 scattered ; the cells are capable of moving in different directions, but 

 in preserved specimens are generally turned downward. (Coll. Essex 

 Inst.) St. George's Bay and Bay of Fundy, in deep waters ; Northern 

 Seas of Europe." Verrill, Mem. Boston Soc. Nat. Hist. i. p. 9. 



67. THOUARELLA. 



Coral simple, with long, simple, filiform branches, spreading on 

 all sides of the stem. Bark formed of large imbricate scales. Polype- 

 cells smooth, bell-shaped, scattered on upperside of branches, covered 

 with four or five series of imbricate scales. 

 Primnoa, 2, Gray, P. Z. S. 1859, p. 483. 



144. Thouarella antarctica. 



Primnoa antarctica, Valenc. Voy. Venus, t. 12. f. 2 ; Milne-Edw. ty 

 Haime, Corall i. p. 140; Gray, P. Z. S. 1857, p. 286. 1859, p. 483 ; 

 Kottiker, Ic. Hist. p. 135. 



Hob. Falkland Islands. 



68. HOOKERELLA. 



Coral erect, fan-shaped, pinnate ; branches simple, nearly parallel. 

 Bark and polype-cells covered with large imbricate scales. Polype- 

 cells bell-shaped, contracted at the base, open and fringed with 

 larger scales at the mouths ; in close series on the upper and lower 

 sides of the branches, opposite to each other. 



145. Hookerella pulchella. 



Hob. Antarctic Ocean, 2 inches high. From Dr. Hooker's 

 drawing no. 255. 



69. CHRYSOGORGIA. 



Coral branched at the base ; branches thread-like, cylindrical ; 

 branchlets cylindrical, subequal, far apart. Bark thin, very brittle, 

 covered with small scales. Polype-cells bell-shaped, sessile, con- 

 tracted at the base, squamose, with a broad 8-lobed terminal mouth, 

 placed irregularly far apart. Axis very short, amber-coloured. 



Chrysogorgia, No. 1, Duchass. 8f Michel. Corall. Antilles, Suppl. pp. 107 



Like Riisea, except that the cells are sessile, not peduncled. 

 Nearly allied to Verrucella ; but the bark is less consolidated, and 

 the cells further apart and elevated. Described by M. Duchassaing 

 and Michelotti twice over, once in Primnoacecv, p. 107, and again in 

 Gorgonellacece, p. 115. 



