NORTH SIDE OF THE BAY OF BISCAY, AUGUST, 1906. 23 



it lengthens into a branch does not produce lateral branches. Wherever 

 I could trace the course of the internal ccenosarcal tube it always came 

 from an auxiliary tube. 



The auxiliary tubes are simply stolons arising from the root of the 

 colony, growing over one another, and producing series of single 

 hydranths, the stems of which do not develop hydranths or branch. 



As all the hydranths are more or less contracted, their natural 

 shape remains uncertain. They possess a broad conical hypostome, 

 and generally ten tentacles, but occasionally eleven are present. The 

 stalk of the hydranth is smooth, of about the same thickness throughout 

 its whole length, and terminates in a slight extension to form the cup 

 for the hydranth. The hydranths which remain sessile or nearly so 

 upon the auxiliary tubes gradually become surrounded by tubes of a 

 later growth, and embedded to such an extent that only their heads 

 arc visible. 



Until the gonosome has been found, this species can only be pro- 

 visionally regarded as a member of the genus Bimeria. As the 

 Hydroid was found at a depth of over 400 fathoms, its gonophore is 

 almost certain to be a sporosac. 



EUDENDRID^. 



Eudendrium ramosum (Linn.). 



At Station IV., 109 fathoms, a few colonies were taken. They are 

 very small in size and attached to worm-tubes. 



Distribution. Some recent foreign records :— California (Torrey). 

 Antarctic Ocean, lat. 71° S., long. 89° W. ; lat. 71° S., long. 87° W. ; 

 lat. 70° S., long. 80° W. ; 220 to 300 fathoms. (Species marked (?), 

 Hartlaub, Belgica Expedition, 1904.) 



Eudendrium rameum (Pallas). 



At Station II., 75 fathoms, a small colony about 1 inch in height 

 was taken. At Station VII., over 444 fathoms, the trawl brought up 

 a piece which had evidently, from the thickness of the stem, been 

 broken off from a large colony. At Station XIII., 412 fathoms, several 

 small colonies were taken, and also a branch about 3| inches in 

 height. Some of the colonies have gonophores. 



Distribution. Some recent foreign records : — Arctic Ocean, off Bear 

 Island, lat. 74° 53', long. 15° 55' E., 180 fathoms (Bonnevie). S.E. of 

 Iceland, lat. 62° 59', long. 10° 37' W., 250 fathoms (Broch, 1903). 

 Portugal (Nobre). Off West Coast of Morocco, 33° 16' N., 8° 53' W., 

 65 fathoms (Billard). California (Torrey). Chile, about lat. 42° S. 

 (Hartlaub, 1905). South Georgia, 135 fathoms (Jaderholm). 



