CLASSIFICATION OF ACTINIARIA jon 
Fundamental differences affect chiefly form and arrangement 
of tentacles and strength of musculature, and details about 
this will be found in Part III. ‘Text-figs. 14 and 19 show 
some of the variation in tentacle-form to be found among 
Stichodactylines and skeletonless corals ; Text-figs. 14 and 15 
show some of the modes of arrangement; and Text-figs. 4 
and 13 give details of musculature. 
Taking them all in all it may be said that the Stichodactylines 
are the nearest analogue among anemones to the composites 
among plants or the birds among vertebrates. A good deal 
of fundamental structure is fixed, and variation more affects 
details or additional features. They may be looked upon as 
Endomyaria (see below) with, above all, tentacular specializa- 
tions, often of a frilly nature. 
§ O. 
So far, taking this paper and Part I together, it has been 
sought to establish the thirty-two families listed below. It 
remains to discuss main subdivisions of the Anthozoa and 
arrangement of families within groups of higher rank. 
Corallimorphidae. Actinidae. Diadumenidae. 
Discosomidae. Aliciudae. Phelliidae. 
Gonactiniidae. Phyllactidae. Flosmarinidae. 
Ptychodactidae. Minyadidae. Marsupiferidae. 
Halcampidae. Aurelianidae. Metrididae. 
Tlyanthidae. Stoichactidae. Chondractinidae. 
Haleuriidae. Homostichanthidae. Actimoscyphudae. 
Actinernidae. Actinodendridae. Sagartidae. 
Condylanthidae. Heteranthidae. Choriactidae. 
Myonanthidae. Phymanthidae. Paractidae. 
Andresidae. Thalassianthidae. 
