SIBOGLINUM SILONE 



297 



Fig. JJ133. Siboglinum silone: A - part of the tentacle; В - arrangement of the beginning of the 



pinnules in the basal part of the tentacle ; С - three papillae of the metameric part of the trunk, 



in ventral view ; D - the region of the girdles in ventral view ; E - part of a girdle ; F - toothed 



platelet from the side. 



an - girdles; da - anterior group of teeth; dp - posterior group of teeth; og- aperture of a pyriform 



gland ; pan - postannular region ; pi - pinnules ; r - rosette of gland cells ; t - tentacle ; v - ventral 



papilla. 



Fig. HH133. Siboglinum silone: A- fore-part of the body from the dorsal, B, from the ventral, 

 and C, from the left side ; D - the anterior portion of the fore-part from the ventral side. 

 с - cephalic lobe ; ci - glandular girdle ; со - dorsal ciliated band ; /- bridle ; ms - mesosoma ; 

 mts - metasoma ; pa - papillae ; pi - pinnules ; ps - protosoma ; s 1 - groove between the protosoma 

 and mesosoma ; s 2 - groove between the mesosoma and metasoma ; s s - pretentacular groove ; 

 s 4 - secondary mesosomal groove; sv - ventral sulcus; /-tentacle; z-zone of growing pinnules. 



