SIBOGLINUM VELERONIS 111 



characteristic of S. timorense. Further material from the Pacific, when 

 available, should help to elucidate the relationship between these species." 



Material : nine fragments of tube, seven in alcohol which had dried out, 

 and two mounted on a slide. 



Locality: Timor Sea: Siboga Station 295 (10°35'S 124°27'E). 



Depth: 2050 m.] 



[29. Siboglimim veleronis Hartman (Fig. El 33) 

 Hartman, 1961 : 542-6, Figs. 1-9. 



This species was taken in 1960 by M.V. Velero IV during the continuing 

 surveys of the offshore faunae of Southern California, conducted by the Allan 

 Hancock Foundation. The description which follows is reproduced from 

 Hartman (1961) by kind permission of the author and of the editors of 

 Pacific Science. Slight alterations have been made in the nomenclature to 

 bring it into line with that adopted here and paragraphs have been transposed. 



"The animal lies usually some distance within the ringed region of the tube ; 

 none has been found partly or wholly out of the tube. With the aid of a 

 stereoscopic microscope the specimen can be seen through the wall of the 

 tube and oriented with respect to the anterior and posterior regions, the 

 tentacle in front directed forward, and the annular band or girdle of toothed 

 platelets marking the approximate middle region of the body. However, 

 dissection is necessary to study the animal more completely. Slitting the tube 

 lengthwise has been found least destructive to the soft-bodied specimen; by 

 using a razor-sharp, finely pointed knife and inserting it into the distal end of 

 the tube, then extending the cut lengthwise for the length of the contained 

 individual, one can then lift it out intact from the shell of the tube. 



"The tentacle is less than half as wide as the body and extends forwards 

 for a length nearly two and a half times that of the mesosomal length. Its 

 insertion marks the ventral side of the body as here interpreted, as well as the 

 posterior end of the first body region or protosoma. The three body regions 

 are not sharply separated from one another. The separation between the first 

 and second regions is behind the tentacular insertion and is vaguely indicated 

 by a faint line extending obliquely forward around the body to the mid- 

 dorsum. The second region, or mesosoma, is about four times longer and is 

 separated from the third region, or metasoma, by a transverse groove located 

 just in front of the paired glandular papillae (see Fig. E133£, F). The third 

 region is much the longest and comprises most of the length of the body. 



"The tentacle is extended forward nearly straight in some specimens and 



