802 T. A. STEPHENSON 



iSp(!cies : 



C. ligidus, Moseley, 1877, p. 301. (.See Hertwig. 1882, p. 23, and 



1888, pp. 9, 10 ; Stephenson, 1920 b, p. 178.) 

 C, profundus, Moseley, 1877, p. 300. (See Hertwig, 1882, p. 28, 



and 1888, pp. 9, 10; Stephenson, 1920 b, p. 178.) 

 C. obtectus, Hertw., 1888, p. 9. (See Stephenson, 1920 b. 



p. 178.) 

 C. ingens, Gravier, 1918, p. 23. 



The above definition of the genus is practically that given 

 in my short note on the genus Corallimorphus (' Proc. 

 R. I. Acad.', 1920, B. 9). I began it there with the words 

 ' Stichodactyline Actiniaria ', this being provisional, as I had 

 not then worked out my idea of its being a skeleton-less coral 

 fully enough for publication. I have listed the four species 

 here for reference purposes, but as before suggested, I am 

 inclined to tljink thej'' are all one, and the more so since dealing 

 with another specimen from an Antarctic collection and looking 

 at the Challenger specimens. C. ingens is probably the same 

 as the others. If the four listed are to be separate, my Irish 

 form would make a fifth. 



IsocoRALLiON, Carlgr., 1900, p. 19. 



C h a 1 rn e r s i a , Del. and Her., 1 901 , p. 536. 

 Corynactis as used by Hertwig for Corynactis, sp., 

 1888, p. 10. 



Corallimorphidae differing from Corallimorphus in ha\'ing the 

 ectodermal muscle in the body-wall stronger, and with normally two 

 disc-tentacles on each of the oldest radii of the disc. 

 Species : 



I. hertwigi, Carlgr., 1900. p. 19. (See Hertwg, 1888, p. 10, 

 Corynactis, sp.) 



I feel doubtful of the distinctness of this genus from Coralli- 

 morphus, but hardly enough is yet known of it to justify 

 their fusion. 



Corynactis, Allm., IS-K). (See Duerden, 1898, p. 635, izc.) 



Corallimorphidae of small size, often gregarious in habit, sometimes 

 forming large sheets of individuals ; often clusters or paii's of individuals 

 are found attached to each other by a basal coenosarc ; fission is a usual 



