CLASS Q^'ICATION OF ACTINIARIA 285 



seems distiuct from Phyllactis in that, apparently, the 

 fronds or acrorhagi have not attained such clear distinction 

 from the rest of the colunni as in that genus, where they make 

 such a very definite zone or ruff. C, variabilis, Hargitt 

 (1911, p. 51), seems of rather uncertain standing — it may come 

 here, or, possibly, under P h y 1 1 o d i s c u s . 



Phymactis, M. Edw., 1857. 



Kivetia, Pax, 1912, p. 1).5 ; Bunodosoma, Verr., 

 1899 ; E u c 1 a d a c t i s , Verr., 1899, p. 49. 



Phyllactidac in which the eolunin is covered thickly with vesicles, 

 which may be quite without arrangement, or may form more or Jess 

 definite vertical rows, and sometimes the rows are of different sizes in 

 a regular way according to mesentery cycles. The vesicles may be 

 simple or more or less compound, and sometimes they fuse inseparably 

 with each other. Acrorhagi, which may be compound, may be present 

 (not always), being sometimes well developed and at others hardly 

 distinguishable, within the same species. Above the acrorhagi a fosse. 

 .Sphincter weak or strong diffuse, circumscribed diffuse, or small to 

 modei'ate circumscribed. Tentacular longitudinal muscle ectodermal. 

 Retractors diffuse, weak or well developed, or stronger and circumscribed 

 diffuse. The older mesenteries may be sterile, or most mesenteries may 

 be fertile. There may be more than two siphonoglyphes, which need not 

 correspond to directives — the latter may be absent. 

 Species : 



P. clematis. Drayton in Dana, 1846, Syn. p. 6. (P. florida, 

 Dana, 1849.) (Wee Carlgren, 1899, p. 17; McMumch, 1904; 

 tSteplienson, 1918 a, p. 2.3.) 

 P. granulifera, Les., 1817, p. 173. (Bunodes taeniatus, 

 McM., 1889, p. 23.) (See Pax. 1910. p. 184; McMurrich, 1889 

 (' Journ. Morph.'), p. 23 ; Duerden, 1902, p. 348.) 

 P. sphaerulata, Duerden, 1902. p. 3.'50. 

 P. kiikenthali, Pax, 1910. p. 189. 



P. papulosa, Les., 18.30, p. 78. (See Pax, 1912, p. d. 6.) 

 P. grandis, Verr., 1868, p. 473; 1899, p. 49. 



I have included Verrill's E u c 1 a d a c t i s grandis with 

 some hesitation in this genus, following McMurrich. It seems 

 to have almost enough to merit distinction in its very definite 

 cyclic rows of vesicles, rather comparable to the verrucae of 

 B u n d a c t i s gemmae e a in arrangement — but there are 



