448 



PART II. SYSTEMATIC ACCOUNT 



Two specimens were studied : a male, fixed while still inside its tube, and 

 a female, which was removed from the tube while still alive and fixed in a 

 state of strong contraction. They have the following dimensions (in mm): 



<? ? 



Length of the tentacles 

 Length of the fore-part of the body 

 Breadth of the fore-part of the body 

 Length of the metameric part of the metasoma 



Fig. 171. Spirobrachia grandis: A - front end of a strongly contracted female in ventral, and, 

 В - in dorsal view. 



с - cephalic lobe; со - dorsal ciliated band; dgt - ducts of pyriform glands seen by transparency; 

 /- keel of the bridle; ns - dorsal nerve furrow; p - cuticular plaques; pa - metameric papillae; 

 s 2 - groove between the mesosoma and the metasoma; sv - ventral sulcus; tc - tentacular crown; 

 te - external tentacle of the tentacular plate. 



