External and internal views of Scolanthus ena sp. n. (NSMT-Co 1610). A External view Whole living specimen of S. ena B–H internal view B longitudinal section of distal end C transverse section of tentacle D longitudinal section of tentacle E transverse section of actinopharynx F enlarged view of mesentery G transverse section of nemathybome H longitudinal section of aboral end. Nemathybomes distributed up to aboral end. Abbreviations: a, actinopharynx; Ne, nemathybome; pm, parietal muscle; rm, retractor muscle; tcm, tentacular circular muscle; Te, tentacle; tlm, tentacular longitudinal muscle; Ts, testis. Scale bars: 5 mm (A); 1 mm (B); 500 µm (E, F, H); 100 µm (C, D, G).