FIGURE 11 in Four palaeonemerteans (Nemertea: Anopla) from a tidal flat in middle Honshu, Japan

FIGURE 11. Callinera nishikawai sp. nov. Holotype, female, ZIHU­3133. A, external appearance of the preserved specimen before serial sectioning. B, transverse section through the intestinal region showing the composition of the body wall; arrowhead indicates the neuro­fibrous layer. C, transverse section through the anterior region of the rhynchodaeum. D, transverse section through the posterior region of the rhynchodaeum showing the sphincter (indicated by the arrowhead). E, transverse section through the intestinal region showing the rhynchocoel muscular sac. BM, basement membrane; CL, cephalic blood lacuna; DM, diagonal muscle layer; EP, epidermis; IN, intestine; LM, body­wall longitudinal muscle layer; LN, lateral nerve cord; LO, lateral sensory organ; LV, lateral blood vessel; MS, rhynchocoelic muscular sac; OC, body­wall outer circular muscle layer; RC, rhynchocoel; RD, rhynchodaeum.