BRITISH ZOOPHYTES. 53 



them is tliat he considei's the proximal filiform tentacles 

 in Stauridium and Cladonema, which he describes as 

 rigid in the species belonging to these genera, to be 

 merely tactile organs, and not tentacular in function. 

 Prof. Allman, however, describes the proximal tentacles 

 of Cladonema not as rigid but as " less contractile than 

 the distal ones." I have, therefore, extended the 

 diagnosis of the family so as to include all the genera. 



Genus I. Cladonema, Dujardin. 



Stems simple or branched, rooted by a creeping 

 filiform stolon, the whole invested by a polypary. 

 Polypites clavate, borne on the summit of the stems 

 and branches. Tentacles arranged in single verticils 

 in the form of two crosses, the proximal tentacles 

 only slightly mobile without capitula, covered towards 

 the extremity with palpocils. Gonophores on the body 

 of the polypite originating free medusiform zooids. 

 Gonozooid bell-shaped, with 8 — 10 radiating canals. 



Mr. Saville Kent {" Infusoria,^' 264) has given the 

 name Cladonema to a genus of Infusoria, but as the 

 name was given to this genus of Hydroids by Dujardin 

 so long ago as 1843, it clearly belongs to it of i*ight, 

 and should stand. 



1. C. EADiATUM, Dujardin. 



Coryne Stauridia (P. H. G., McA.), Stauridie {Dnj.). 



Hab. : Devonshire (P. H. G.) ; Zoological Gardens in 

 tanks, Kent (Dowker). Height | — 1 in. Stem smooth, 

 slender and creeping, light yellowish-brown in colour. 

 Polypite pale red. Tentacles arranged in two cruciform 

 verticils, 4 in each. The proximal ones capitate and 

 longer than the distal ones, which are filiform and only 

 slightly, if at all, mobile. 



