SIBOGLINUM CONCINNUM 



289 



Fig. ЕЕ 133. Siboglinum concinnum: A - fore-part of the body in ventral view; В -a. portion of the 

 fore-part in ventral view ; С - part of the tentacle ; D - region where the meso- and metasoma meet. 

 ag - ventral glandular part of the mesosoma ; с - cephalic lobe ; cut - cuticle ; /- bridle ; ms - meso- 

 soma; mts - metasoma ; pa - papillae; pi - pinnules ; ps - protosoma ; s 1 - groove between the 

 protosoma and mesosoma; 5 2 - groove between the mesosoma and metasoma; t- tentacle; 

 tg - glandular ribbon of mesosoma ; tl - lateral glandular tract of metasoma. 



