554 VALKERIIDiE. 



Geographical Distribution. Baltic (Mtiller) : Bel- 

 gium (Van Ben.) : Bahusia, 5-TO fathoms (Smitt) : Katte- 

 gat (Kirchenpauer) : RoscofF (Joliet)^". 



Yalkeria tremula^ Hindis. 



Plate LXXX. Gg^. 1, 2. 



Valkeria tremula, Hincks, Dev. Oat., Ann. N. H. ser. 3, ix. (1862), 472, 



pi. xii. fig. 9. 

 Campylonema tremuluji, id. Ann. N. H. ser. 4, x. (1872), 396, pi. xx. fig, 5. 



Stem filiform, creeping. Zooecia distributed upon it at 

 intervals in groups, very small and slender, elongate, 

 slightly narrowed above, and below tapering off to a 

 point. 



Polypide with 8 tentacles. 



This species is distinguished by its extreme minuteness 

 and its tapering cells, which arc attenuated downwards 

 from the middle and terminate in a point. They are 

 very slightly attached : when the polypide is retracted 

 they droop a little to one side, and rise into an erect posi- 

 tion when it expands. 



The polypides are extremely minute and very nimble in 

 their habits ; those of Valkeria uva appear coarse and 

 clumsy beside them. 



This is the first species in which I observed the peculiar 

 arrangement of the tentacles, and the genus Campylonema 

 was founded for its reception. But as it now appears 

 that V. cuscuta, the type of Fleming^s genus Valkeria, 



* Joliet records both the creeping form and the erect — " dont les fila- 

 ments flottant librement dans I'eau atteignaient jusqu'a 6 et 8 centimetres 

 de longueur," — and remarks that it is impossiblo to distinguish the two 

 specifically. 



