54 Prof. Allman on the Hydroid Zoophytes. 



position out of tubules. The spermatozoa have a long conical 

 body with a caudal filament. 



The coenosarc of Eudendrium bacciferum is of an orange colour, 

 which being visible through the transparent polypary, especially 

 in the younger portions of the specimen, renders the zoophyte, 

 notwithstanding its small size, eminently conspicuous among 

 its more sombre associates, particularly when furnished with its 

 large berry-like deep-orange gonophores. 



The general character of the present zoophyte, but especially 

 the very remarkable position of the gonophores on the summit 

 of true, though arrested branches, afibrds a strong inducement 

 to define it as a new genus ; and as such I had recorded it in 

 my note-book. I believe, however, the adoption of this course 

 would be premature in the absence of further information re- 

 garding allied forms, which can be surely determined only when 

 examined in their living state and while furnished with their 

 polypes and gonophores ; and I therefore consider it safer to 

 view it for the present as a Eudendrium, though a very distinct 

 species. If the result of a critical study of the various species 

 of Eudendrium and its allied genera should prove the title of 

 this zoophyte to a distinct generic rank, I would propose for it 

 the generic name of Corythamnium. 



V. Coryne Briareus, nov. sp. 



The Coryne which forms the subject of the present note was 

 found covering the surface of a stone in one of the rock-pools 

 left upon the shore of the Forth by the retiring tide. 



An irregular network of chitinous tubes adhered to the sur- 

 face of the stone, and threw up at close intervals, to the height 

 of about half an inch, wider tubes, from whose summits the 

 polypes emerged. These polypiferous tubes themselves fre- 

 quently gave ofi^ long free branches, which then bore short 

 polypiferous ramuli, like those which spring immediately from 

 the adherent net-like stolon. 



The polypes are of a clear white, with an occasional pinkish 

 tint given by the coloured granules of the stomach-walls. They 

 are very extensile, and in their fully-extended state they assume 

 nearly a cylindrical shape, their club-like form becoming almost 

 entirely obliterated. The tentacles are very numerous, from forty 

 to fifty, and are scattered irregularly over the body, or at most 

 show a very slight tendency, when the polype is fully extended, 

 to a verticillate arrangement. 



The gonophores are borne in a single, somewhat verticillate 

 cluster upon the body of the polype, having a few tentacles be- 

 hind them, but the greater number in front of them. They are 

 supported upon short peduncles, and contain each a single 



