ACHARADRIA. 875 



*^* Heterostephanus annulicok^^is, Sars, sp. 



CoRYMOKPHA ? ANNUncoRNis, — Stirs, Forliaucll. i vid. Selsk i Christiania, 1859; trans. 



in Wiegm. Arch., 18G0, p. 311 ; trans, in Ann. Nat. 



Hist, for Nov., 1861. 

 Heteractis annulicornis, — Allman, in Ann. Nat. Hist, for May, 1861. 



TROPHOSOME. — Htduosome attaiuing a height of two thirds of an inch. 

 HxDRANTH with the proximal tentacles twenty in number and " annulated ;" the 

 distal tentacles eight to ten, very short. 



GONOSOME. — Peduncles of the gonophoees very short. 



Habitat. — On a muddy bottom in the sea. 

 Bathymetrical Distribution. — Coralline zone. 

 Locality. — Floroe, coast of Norway ; Sars. 



In referring the present species to the genus Corymorpha, Sars expresses a doubt as to the 

 correctness of this association, but ventures no opinion as to an alternative. It is not easy to say 

 what may be the character which Sars desires to express by the term " annulated," which he 

 applies to the tentacles composing the distal verticil. He found the species on only one occasion, 

 when he obtained two specimens at a depth of from thirty to forty fathoms. 



ACHAEADEIA, StretUll WrigU. 



TROPHOSOME. — Hydrocaulus simple or irregularly branched, with a well- 

 developed PEEiSAEC. Htdeanths with two verticils of tentacles, those composing 

 the proximal verticil filiform, those composing the distal verticil shorter and capitate. 



GONOSOME.— Unknown. 



If a perisarc were developed in Vortidava this genus would become Acharadria, so far at 

 least as the trophosome is concerned, for we know nothing as yet of the gonosome. In Achar- 

 adria, moreover, the only descril^ed species is branched, while Vortidava is simple. 



The affinity of Acharadria to Pennaria and Halocordyle is too obvious to be overlooked. 



