HEPTABRACHIA TALBOTI 



351 



towards the middle part of the tube the brown rings become narrower and 

 less distinct (Fig. A144i?) and finally disappear. The posterior part of the 

 tube is whitish and its rather thick walls are encircled by slightly wrinkled 

 marks about 1 cm apart. One short fragment of tube with stiff, transparent, 

 yellow walls may be the extreme anterior end of one of the tubes of this 

 species, although other species of Heptabrachia have the anterior end of the 

 tube colourless, with thin, limp walls (Ivanov, 1957). 



.; .«in.'.» 



f.. ■ . 



ЛВС 



Fig. A144. Tube of Heptabrachia talboti n. sp. A- anterior; В -middle; С -posterior 

 (After Southward, 1961b). 



The animal has lost the distal parts of the tentacles and much of the 

 posterior part of the body. Although parts of the specimen are crushed the 

 following details can be seen. At the anterior end about 15 tentacles were 

 attached to the cephalic lobe of the protosoma, or first segment (Fig. 

 В144Л, B), and about half of these tentacles were lying along the mesosoma 

 (an unusual position which may have been produced during fixation). These 



