Pogonophora — C utler 
425 
Fig. 13. A—E, Siboglinum albatrossianum. A, Forepart of body from ventral side; B, from dorsal side; C, 
spermatophore; D, region of a girdle; E, toothed platelets. 
F, Siboglinum ecuadoricum, side view, b, Bridle; da, anterior teeth; dp, posterior teeth; pa, papilla; Si, 
post-tentacular groove (between protosome and mesosome); S2, groove between mesosome and metasome. 
