OLASSIFICATION OF ACTINIARIA 497 
Royal Dublin Society, and the executors of the late Mr. Saville- 
Kent. 
2. Brier Historical SECTION. 
Unfortunately space forbids the inclusion here of even 
outline histories of all the families dealt with in the paper 
similar to those given for Sagartiidae and Paractidae in Part I. 
The number of families is far greater, and possibly the historical 
interest is less than in the previous case. The following 
details, therefore, are limited to an outline of the more usual 
classifications used up to date, and which it is the suggestion 
of this paper to modify. 
G. C. Bourne’s scheme is the following : 
Class ANTHOZOA. 
Sub-class I. Octactiniaria (Octocorallia, Carlgren). 
Sub-class II. Ceriantipatharia (Hexacorallia, Carlgren). 
Sub-class III. Zoanthactiniaria (Dodecacorallia, Carlgren). 
Order 1. Zoanthinaria. 
Order 2. Edwardsiaria. 
Order 8. Dodecactiniaria. 
Sub-order A. Madreporaria. 
Sub-order B. Actiniaria. 
The principle of his three sub-classes is that of Carlgren, 
Bronn’s Thierreich, 1908. 
The position of the Zoanthinaria and Edwardsiaria varies 
in different schemes. In Carlgren’s 1900 plan, for instance, 
the Edwardsiaria go under his group Athenaria, and the 
Zoanthinaria stand away separately and rank equal to the 
Ceriantharia and Actiniaria. Bourne has recently shown (9) 
that the Edwardsiids must be clearly separated from ordinary 
Actinians, and it is his allocation of them which is to be accepted. 
The subdivision of the sub-order Actiniaria will vary 
accordingly as one follows Carlgren or not. Carlgren’s division, 
as used by him in ‘Ostafrikanische Aktinien’ (1900), for 
example, is as follows; 
