348 PODOCORYNIDyE. 



and vividness of tint which can hardly be described." This haliit is certainly so different from 

 that of our European form as to give support to the view which would regard the two as 

 specifically distinct. 



PODOCORYNIDjU. 



TROPHOSOME. — Hydkophyton a continuous adherent expansion formed by 

 adnata and inosculating canals ; the deeper part with its component canals invested 

 by a chitinous perisaec while a layer of naked ccenosarc spreads over the free 

 surface. Hydeanths with verticillate filiform tentacles. 



GONOSOME. — GoNOPHOEEs phanerocodonic. 



PODOCOHYNE, Sars (in part). 



Name. — From ttouc, a foot, and Cori/ite, a genus of hydroids, in allusion to its broad basal 

 expansion. 



HvDRA, — Rud. Wagner. 

 DrsMORPHOSA (?), — Philippi, 

 Hydractinia, — Chr. Loven. 



TROPHOSOME. — Hydranths claviform, with a single circlet of filiform tentacles 

 surrounding the base of a conical hypostome. 



GONOSOME. — GoNOPnoREs phanerocodonic, borne on the body of the hydranth 

 at the proximal side of the tentacles. Planoblast with a deep bell-shaped umbrella, 

 a small four-lipped manubrium, four radiating canals, and four or eight marginal 

 tentacles with bulbous bases which are destitute of oceUi. 



We are indebted to Sars for the institution of the genus Podocorytie, founded on a hydroid 

 which he discovered in the Norwegian seas. The peculiar condition of its hydrophyton, con- 

 sisting as this does in its fully developed state of a continuous hydrorhizal expansion, formed by 



