SIBOGLINUM EXILE 



307 



[35. Siboglinum exile sp. nov. Ivanov (Figs. PP133-SS133) 



In a dredge haul brought up from a depth of 626 m by R.V. Vityaz? in 

 the Indian Ocean near the south coast of Sumatra, I found three species 

 of Siboglinum, including that described here as Siboglinum exile (Lat. exilis — 

 thin, lean). Out of seven tubes five contained animals. 



The body of S. exile is very fine — e. 0-1 mm in diameter. The fore-part 



Fig. PP133. Siboglinum exile: The fore-part of the body viewed from the right side. 



с - cephalic lobe ; f- bridle ; ms - mesosoma ; mts - metasoma ; ps - protosoma ; / - tentacle. 



