24 HYDROIDS COLLECTED BY THE " HUXLEY " FKOM 



TUBULARID^. 



Tubularia sp. 

 At Station II., 75 fathoms, a single Tuhularia Hydroid was found 

 attached to a worm-tube. It has the appearance of a young form. 



CALYPTOBLASTEA. 

 CAMPANULAEID^. 



Clytia johnstoni (Alder). 



A few colonies with gonophores were found at Stations I. and II., 

 75 fathoms. They were attached to Sertularia ahictina and to other 

 large Hydroids. 



The bathymetrical distribution of Clytia johnstoni is from the shore 

 down to about 100 fathoms. 



Campanularia Mncksii, Alder. 



This species was fairly common at most of the stations, extending 

 from 75 fathoms down to over 444 fathoms. It was usually attached 

 to Sertularella, occasionally on Antennularia, but only once seen on a 

 Diphasia. Colonies with gonophores were taken at Station II. 



CamjMnularia Mncksii is similar to Clytia johnstoni in its mode of 

 growth and habitat, but differs in its method of reproduction. The 

 gonophores contain fixed sporosacs which mature their products 

 within the gonangium. Clytia liberates free-swimming medusaB which 

 belong to the medusoid genus Fhialidium. 



It does not occur so close to shore as Clytia, but extends to a much 

 greater depth. 



Distribution. Some recent foreign records : — Off east coast of Green- 

 land, 74° 7' N., 19° 4' E. ; 50 fathoms; 019° C. Off Norwegian coast, 

 62° 17' N., 4° 57' W. ; 145 fathoms (Broch, 1903). Morocco, off Cape 

 Spartel, 60 fathoms (Billard). 



Campanularia raridentata, Alder. 

 A few hydranths resembling Alder's figure were seen on Sertularella, 

 and on a broken shell at Station IV. 



CAMPANULINID^. 



Calycella fastigiata (Alder). 



A few colonies were found attached to Sertularella and to the roots 

 of Diiihasia alata, 75-240 fathoms. 



Distribution. Some foreign records : — Norway, Aelesund, 55-100 

 fathoms (Bonnevie). Gulf of Gascogne, 225 fathoms. Off west coast 

 of Morocco, 33° 16' N., 8° 53' W.; 60 fathoms (Billard). 



