Figure 15 in Character-matrix based descriptions of two new nemertean (Nemertea) species

Figure 15. Schematic view of transverse section through the intestinal region of a nemertean to show the various organ systems mentioned in the character matrix list. The dashed lines show distribution of intestinal diverticulae alternating with the reproductive system. Abbreviations: Layers and structures of the body wall: E, epidermis; D, dermis; CM, circular muscle layer; LM, longitudinal muscle layer; PA, parenchyma. Proboscis apparatus: R, rhynchocoel; PM, proboscis retractor muscle. Alimentary system: I, intestine; IE, intestinal epithelium; SID, shallow intestinal diverticula; DID, deep intestinal diverticula. LN, lateral nerve cord; LV, lateral blood vessel. Reproductive system: G, gonad; O, ovary; OC, ovocyte; N, nucleolus; GD, gonoduct; GP, gonopore.