232 



PART II. SYSTEMATIC ACCOUNT 



long. The morphology of the remaining parts of the body has not been open 

 to investigation. 



In one individual studied the tentacle was 19 mm long and the fore-part 

 of the body с 2 mm long. The overall length of the body, excluding the 

 tentacle, in another individual was c. 50 mm. 



The front, filmy part of the flexible ringed yellowish or slightly brownish 



Fig. 118. Siboglinum meridiale: A - front end of the body in ventral view; В - part of a girdle; 

 С - toothed platelet; D - tube. 



с - cephalic lobe; da - anterior group of teeth; dp - hind group of teeth;/- keel of the bridle; 

 ms - mesosoma ; pa - papillae ; ps - protosoma ; s 2 - groove between the mesosoma and the metasoma ; 

 sv - ventral sulcus ; t - tentacle. 



