262 



PART II. SYSTEMATIC ACCOUNT 



them. Numerous transverse fibres run in the interspaces (Fig. 13QB). The 

 black half of the tube has the same general nature, but the rings here are 

 longer and the intervals between them lack fibres, but instead are thrown into 

 deep transverse wrinkles (Fig. 130C). The length of the only available scrap of 

 tube is 150 mm, with a diameter near the front end of 0-37 mm and near the 

 back end, 0-3 mm. 



$ "=^=3k 



Fig. 130. Siboglinum taeniaphorum: Tube: A - anterior part; В - middle part; C- hind part. 



S. taeniaphorum is very closely related to S. atlanticum but at the same time 

 clearly distinct from it. Both species share in common, in contrast with all 

 other representatives of the genus, the following features : a very long meso- 

 soma, seven to ten times as long as broad, the possession of ventral glandular 

 areas of integument in front of the bridle, and the development of long paired 

 glandular tracts on the ventral side of the mesosoma, behind the bridle 

 and along the fore-part of the metasoma, above the metameric papillae. 



