REPORT ON THE ANTIPATHARIA. 75 



Subfamily Antipathin.e, Brook. 



Zooids not dimorphic, each possessing six tentacles, which may he radiately arranged, 

 or in two rows of three each. There is a tendency for the transverse axis of the zooid 

 to become much elongated in the direction of the horny basis. 



This subfamily corresponds to the family Antipathidse of Vcrrill, and includes all the 

 species of Antipathida; previously described, of which the zooids are known. It includes 

 the following genera : — 



Girripaihes (Blainv.), emend. 

 Stichopathes, n. gen. 

 Leiopathes (Gray), M.-Edw. (erne ml.). 

 Antipaihes (Pall.), emend. 



Antipaihella, n. gen. 

 Aphanipaihes, n. gen. 

 Tylopathes, n. gen. 

 Pteropathes, n. gen. 



Parantipathes, n. gen. 



Subfamily Schizopathin.-e, Brook. 



Zooids dimorphic, each with two tentacles. Of the three individuals morphologically 

 comparable with the unspecialised zooid of Antipathinaj, two are reproductive (gono- 

 zooids) and one is nutritive in function (gastrozooid). 



The following genera belong to this group : — 



Scliizopatlies, n. gen. 

 Bathypathes, n. gen. 



Taxipathes, n. gen. 

 Cladopathes, n. gen. 



Family III. Dexdeobeachiib^, Brook. 



Antipatharia the zooids of which have branched " retractile " tentacles. The scleren- 

 chyma is apparently without a central canal and is distinctly spinose. In the younger 

 portions of a colony the sclerenchyma forms irregular plate-like longitudinal ridges 

 varying in number, the angles between which are filled up by a further secretion of 

 sclerenchyma, so that ultimately the axis becomes cylindrical as in the Antipathidas. 



Dendrobrachia, n. gen. 



In seeking to establish new genera I have, with one exception, made a microscopic exam- 

 ination of the polyps of the type species. There are, however, so many species of which 

 the polyps are not known that it is impossible at present to refer all to their jDroper position. 

 Structural characters have not previously been taken into consideration, and authors have 



