308 T. A. STEPHENSON 



not cndocoelactous. Nor is it an Acti nose y ph ia since it has 

 numerous perfect mesenteries. It must therefore belong to Catadio- 

 mene or Polys iplionia, as it has basal swellings to the tentacles; 

 and from the description I gather that it is more likely to be Poly- 

 siphonia than the other, but further details are needed for decision. 



4. iSagartia sociabilis (1918, p. 10). No cinclides. Seemingly 

 six pairs of perfect mesenteries with weak musculature. If it has acontia 

 it must be a S a g a r t i o m o r p h e — certainly not a Sagartia. 



5. S. sobolescens (1918, p. 11) is perhaps a Sagartiomorphe 

 also, 



6. Chitonantlius incubans (1918, p. 11) is very exceptional as 

 a Chondractiniaii in having the three oldest cycles of mesenteries fertile. 

 Since Chi tonan thus is only a synonvm of Hormathia, the 

 right name for the species is H o r m a t h i a incubans. 



7. Chitonanthus indutus (1918, p. 12) should, similarlj', be 

 Hormathia i n d u t a . 



8. Chitonanthus abyssorum (1918, p. 13) seems to be either 

 Hormathia abyssorum or an A c t i n a u g e . 



9. Hormathia elongata (1918, p. 14) seems correctly named. 



10. Hormathia? musculosa (1918, p. 15) has apparently no 

 acontia, so cannot be a Chondractiniid. It has numerous perfect 

 mesenteries and a mesogloeal sphincter, which bring it to Paractidae ; 

 its circumscribed retractors and some of its externals suggest Hormo- 

 soma or Tealidium or Pseudoparactis, but this is uncertain. 



. and it may need a new genus. 



11. Stephanactis impedita (1918. p. 16) becomes Stephan- 

 auge impedita, since Verrill has shown that the name Stephan- 

 actis was preoccupied. 



12. Stephanactis inornata (1918. p. 17) becomes Stephan- 

 auge inornata. 



13. Corallimorphus ingens (1918. p. 23) ; see this paper, p. 302. 



14. Ancmonia insessa (1918, p. 3) is more likely a Gyrostoma. 



(ii) Details from Verrill. 



1. Verrill (1899) has explained that the name Stephan- 

 actis is pre-occnpied (1868), and renamed Hert wig's genus 

 Stephanauge. There are now recorded, as forms with 

 mesogloeal sphincter, six pairs of j^erfect mesenteries (not 

 macrocnemes), no acontia, and a very few (up to about eight) 

 cinclides, Stephanauge impedita, Grav., S , inornata. 

 Gray., S. abyssicola, Hertw. (=Actinauge nexilis, 

 Verr,), S. tuberculata, Hertw., &:c. In Part I of this 



