i86 



DISCOVERY REPORTS 



rectangular pinnules. In the thoracic region the hooks (Fig. 33 e) have very long shafts 

 and the head consists of a single large tooth surmounted by a crest of denticles. All the 

 thoracic hooks appear to be of the same kind. The abdominal hooks (Fig. 33/,^) are 

 small and pectiniform. They have two transverse rovv^s of four to five teeth above the 

 main basal tooth. They are furnished with long chitinous supports {soies de soutien). 

 The hinder end of the body is damaged. 



■5 MM 



•05MM 



005MM 



■05 MM 



005MM 



§ 



Fig. 33. Octohranchus antarcticus . 

 a. Anterior region from the side. e. Thoracic hook. 



Tentacles and all the gills /. Abdominal hook seen from the 



except one are missmg. 

 Thoracic notopod. 

 Shorter thoracic bristle. 

 Longer thoracic bristle. 



side. 



Abdominal hook seen from the 



front. 



