CLAVATELLID^. 383 



GONOSOME. — GoNOPnoRES spherical on alternately branched processes. 



Habitat. — Attached to stones in the sea. 



Bathymetrieal Distribution. — Latuinarian to decpwater zone. 



Localities. — Coast of Greenland, Fabricius ; coast of Norway, Sars ; Falmouth, Mr. Cocks; 

 coast of Devonshire, Mr. Gosse and Mr. Hincks ; Grand Manan, Atlantic shores of North 

 America, Mr. W. Stimpson. 



If I am right in believing that all the examples of Myriotlida hitherto found belong to a 

 single species, the distribution of Myriotlida phryyia in the North Atlantic is a wide one, for the 

 species is found both upon the European and American shores. 



Not having succeeded hi obtaining a specimen of Myriothela, I am unable to record any 

 observations of my own on this most interesting hydroid, and the account here given has been 

 derived from the notices of other observers, more especially of Cocks, Alder, and Hincks. Hincks 

 compares the processes vvliich carry the gonophores to the lalastostyles of Hydractinia. To this 

 view, however, the origin of the processes from the body of the hydi-anth is opposed. Their form 

 and situation, indeed, judging from the publislied and other figures which I have seen, would 

 suggest rather a comparison with the gonophore peduncles of Tiibularia and Coryniorpha. 



CLAFATELLIDjE. 



TROPHOSOME. — Htdranths with simple verticillate capitate tentacles. 



GONOSOME. — GoNOPiioBES in the form of ambulatory medus.e, with undeveloped 

 umbrella and branchina: marafinal tentacles. 



CLAVATELLA, ninch. 



Name. — A diminutive noun, formed from clava, a club, in allusion to the form of 



the hydranth. 



Eleutheria, — Kro/in. 



TROPHOSOME. — Htdrocaulus rudimental, springing from a creeping filiform 

 HTDRORHiZA, the whole invested with a chitinous perisarc. Htdranth elongated. 



