Fig. 13From: Biology and distribution of hemichordates (Enteropneusta) with emphasis on Harrimaniidae and description of Protoglossus bocki sp. nov. from Scandinavia Protoglossus bocki n.sp. Cross section of the posterior part of the proboscis through the axial complex. Scale bar 100 μm. Photograph: Sixten Bock. Cml circular muscle layer, Dg dorsal groove, Dnt dorsal nerve thickening, Gce glandular and ciliated epithelium, Gl glomerulus, H heart (blood sinus), Lpm longitudinal proboscis musculature, Nfl nerve fibre layer, Pc pericardium, Pro protocoel, St stomochord, Stl stomochord lumen, Vm ventral mesenteriumBack to article page