Fig. 127. Siboglinum robustum : A - front part of the body from the dorsal, and, В - from the ventral 

 side ; С - the region of the girdles from the ventral, and, D - from the dorsal side ; E - part of a 

 girdle (on one platelet the bases of the teeth are indicated) ; F - a toothed platelet from one side ; 

 G - part of the anterior, flimsy, region of the tube ; H - middle part of the tube ; / - hind part of 

 the tube. 



an - girdles; с - cephalic lobe; со - dorsal ciliated band; da - anterior group of teeth; dp - posterior 

 group of teeth;/- keel of the bridle; ms - mesosoma; pa - papillae; ps - protosoma; 5 1 - groove 

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

 s 4 - post-tentacular groove ; sv - ventral sulcus ; t - tentacle. 



