CLASSIFICATION OF ACTINIARIA 283 



of tliein diverging along different lines from somewhere near 

 the same place, it is probably best to include them all in one 

 family, the Phyllactidae. It will show a good deal of range 

 as to detail, Ijut with the fundamentals in common. 



An extended discussion of other families which have been 

 involved near Phyllactidae seems hardly necessary. It was 

 pointed out in Part II (p. 5B0) that Dendromeliidae and 

 Thaumactidae could hardly be upheld. Any inclusion of 

 vesicled genera like Bunodosoma in the Bunodidae seems 

 to have been a mistake. Home genera here placed in Phyl- 

 lactidae were referred to Aliciidae before, but the revised sense 

 in which the families are hero taken necessitates an alteration. 



Phyllactis, M. Edw. and H., 1851. 



Oulactis, M. Edw. and H., 1851 ; Asteractis, Verr,, 

 1868; Lophactis, Verr., 1868; '? Actinostella, 

 Duch., 1850. 



Phyllactidae. Column may be capable of a good deal of elongation ; 

 it has verrucae which usually occur in vertical rows and may attach 

 foreign bodies to themselves. Above the verrucae and below the 

 margin proper there is a very definite ruff, frill, or collar, which may be 

 quite wide and conspicuous, and is formed of a number of radiating series 

 of vesicles separated from each other by grooves, and which apparently 

 represent complicated and extended acrorhagi ; the whole ruff is 

 separated from the tentacles by a fosse ; the detail of the acrorhagi or 

 ' fronds ' varies in different cases. Sphincter usually circumscribed, 

 more or less, not very strong, but it may be diffuse. Tentacular longitu- 

 dinal muscle ectodermal. Retractors typically strong, diffuse to circum- 

 scribed cUffuse. 

 Species : 



P. praetexta, Dana, 1849, p. 150. (See McMurrich, 1905 



on D. and M. Actinians.) 

 P. flosculifera, Les., 1817. (See McMurrich, 1889 ('Journ. 

 Morph.') ; 1889 (Bermudas).) (P. fasciculata, McM., 

 1889 (Bermudas), p. 108.) 

 P. conchilega, D. and M., 1860. (?P. expansa, Duerden, 

 1898, p. 455.) (See Pax, 1910, p. 194; McMurrich, 1905 ; Duer- 

 den, 1898, p. 455, and 1902.) (P. folios a, Andres, 1883, 

 p. 505.) 

 P. bradleyi, Verr., 1868, p. 465; 1899. 

 P. ooncinnata, Dana, 1846, p. 152. (See Pax, 1912, p. D. 12.) 



