CLASSIFICATION OF ACTINIARIA 265 



family without making that family rather heterogeneous. 

 It might be included in Actiniidae on the same principle by 

 which I included Halcampactis, a genus with no base, 

 in the Phelliidae — biit there it was a case where there was 

 transition to be traced between forms with no base and those 

 with a base; and it does not follow that the same course need be 

 observed in the two cases. At any rate I put forward the 

 Andresiidae tentatively, as being the most expedient plan at 

 the moment. 



Family 4. Actiniidae, sens, strict. 



Actiniidae, Gosse + Bunodidae, Gosse, as used by Haddon, 

 1 898, p. 414, but excluding Antheopsis, Macrodactyla, 

 and Myonanthus, which he includes. 



Including Actiniidae (or Antheadae) and Bunodidae of most 

 authors, with certain genera removed. Bunodidae, Gosse = 

 Cribrinidae, McM. =Bunodactidae, Verr. 



Including Boloceridae, McM. ; Glyphactininae, Koule 

 Tealidae, Hertw. : Isohexactiniae, Kwiet. ; Antheomorphidae 

 Hertw. ; Liponemidae, Hertw., pro parte; Holactiniae 

 Boveri, &c. 



Endomj'-aria with a base which is sometimes rather reduced, usually 

 well developed ; or it may be elongate through attachment to a spine. 

 Body-wall smooth or with verrucae, but without vesicles. Margin 

 tentaculate or distinctly marked off as a parapet or collar ; with or 

 without acrorhagi. Tentacles simple or with paired lateral enlarge- 

 ments ; provided with sphincters rarely, more usually not ; their longitu- 

 dinal musculature usually ectodermal, rarely mesogloeal. Sphincter 

 absent or endodermal; weak or strong ; exhibiting various grades of deve- 

 lopment — diffuse, circumscribed, &c. Not more than oiie tentacle to each 

 exo- and endocoel. Mesenteries not divided into macro- and micro- 

 cnemes, nimiber of perfect mesenteries usually considerable, always 

 more than six pairs in adult animals. Retractors variable, but often 

 strong. Usually fertility affects either all the mesenteries or most of 

 the older ones, though in other cases these are sterile. 



U 2 



