SIBOGLINUM CINCTUTUM 



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the bridle and the tentacle (Fig. А109Л, D). Behind the bridle there is a 

 narrow ring of epidermal glands, complete except for a small gap on the 

 ventral side. The fore-part of the body is 0-89 to 1 mm long, while the 

 diameter of the mesosoma is 0-17 to 0-23 mm and the ratio of the two 

 measurements is 5 : 1. 



Fig. A109. Siboglinum cinctutum var. subtile: A - anterior end of animal, ventral view; В, С - 

 middle and anterior parts of tube ; D - dorsal view of bridle ; E - toothed platelets, lateral view ; 

 F - girdles. Heavy stipple shows the position of the epidermal glands. (After Southward, 1961b.) 



