Fig. 10. A–G in Cutting the ribbon: bathyal Nemertea from seeps along the Costa Rica margin, with descriptions of 2 new genera and 9 new species

Fig. 10. A–G. Alvinonemertes dariae gen. et sp. nov., holotype (SIO-BIC N281), transverse histological sections. H–N. Alvinonemertes claudiae gen. et sp. nov., holotype (SIO-BIC N283), transverse histological sections. A. Anterior tip of head with proboscis pore. B. Brain region. C. Anterior brain region with cerebral canal (arrowhead). D. Stomach region with excretory canal. E. Posterior body region with testes. F. Lateral nerve cord with accessory nerve in stomach region. G. Proboscis armature, accessory stylet pouches with accessory stylets. H. Anterior tip of head with proboscis pore. I. Region anterior to cerebral ganglia with well-visible cerebral canal (arrowhead). J. Anterior brain region. K. Pyloric region. L. Proboscis and mid-dorsal vessel in stomach region. M. Proboscis armature, circular basis of central stylet. N. Proboscis armature, accessory stylet pouches with accessory stylets. Abbreviations: an = accessory nerve; ap = accessory stylet pouch; as = accessory stylet; bl = blood vessel; br = brain; cg = cephalic glands; cm = circular muscle layer; co = cerebral organ; dl = dorsal brain lobe; ec = excretory canal; gd = gonoduct; i = intestine; ic = intestinal cecum; ip = intestinal pouches; lm = longitudinal muscle layer; ln = lateral nerve cord; mv = mid-dorsal vessel; p = proboscis; pe = proboscis epithelium; pp = proboscis pore; py = pylorus; rc = rhynchocoel; rd = rhynchodaeum; sb = stylet basis; st = stomach; t = testis; vl = ventral brain lobe. Scale bars: A–G = 100 µm; H–N = 30 µm.