l'>10.] FROM MEHGUI ARCHIPELAGO. 809 



tiibiited species has been described from the Indian Ocean only 

 by Billard, from Macalonga, Mozambique, 22 metres (1907 6, 

 p. 338). 



Family Campaxularid.e. 



Campanularia corrugata Thornely. 



Except at Station 1, where it was also associated with Sertu- 

 Inrellu guadridens and Diphaiia digitalis, this species always 

 occurred as an epizoon on Idiapristis. 



Localities. St. 1, east of Tavoy Island and Port Owen, 4 to 12 

 fathoms, sand and broken shells, and mud; short and stout, 

 strongly ribbed hydrothecse on Diphasia digitalis, and long, cylin- 

 ilrical individuals on Idia pristis. Stt. 15 and 16, Ravenshaw 

 Island, Sir John Malcolm Island, and Alligator Rock, 5 to 18 

 fathoms, rock and sand, or rock and mud ; occasionally. St. 22, 

 Hastings Harbour, sliore to 20 fathoms, rock and sand ; fairly 

 common. St. 23, Five Islands, 8 to 12 fathoms, rock and sand, 

 an<l mud ; not common. St. 25, Gregory Group and Crichton 

 Island, 4 to 14 fathoms, stones and broken shells and rock: rare 

 cylindrical hydrotheca; with short stalks. St. 35, lietween Warden 

 Island, Howe Island, and Lyall Island, 15 to 20 fathoms, rock 

 and sand ; rare. 



Campanularia raridestata Alder, 1857. 



From British examples the majority of the specimens here 

 loferred to C. raridentata difler in lacking tlie swelling which 

 intervenes between the base of the stalk and the stolon, in this 

 respect resembling examples recoided from areas so wide apart as 

 Calbuco, South America (Hartlaub, 1905, p. 567), St. Malo, France 

 (Markt.-Turner., 1890, p. 205), and the Indian Ocean (Hincks, 

 1889, p. 133, cf. pi. xii. fig. 5). From seven to eleven rings occur 

 at the base of the stem, and from three to five underneath the 

 hydrotheca, and sometimes a few anuulations mark also the 

 middle portion of the stem. The margin of the hydrotheca 

 appears to be divided into from five to seven large teeth, the 

 extreme tenuity and tran.sparency of which render them difficult 

 to observe. The hj'dranth liears twelve to thirteen tentacles. 



No gonosome was observed. 



The dimensions of the Mergui specimens are much less than 

 those of St. I\Ialo specimens recorded by Marktanner-Turner- 

 etscher (1890, p. 205), and approach mo.'^t closely those of a single 

 example from Saint- Vaast described by Hillani (1907rt, p. 173), 

 with which they ahso agree in possessing few hydrothecal teeth. 



Dimensions, in mm. : — 



St. 1. .St. 2.r 



Stem, length 0-59 0-35-0-45 



„ diameter 007 0-04-00(l 



Hydrotheca, depth 0-50 0'2'J-0-41 



„ diameter at mouth 0-17 0-13-0"15 



[llj 



