OBTAINED DURING THE CRUISE OF H.M.S. VALOROUS. 511 



Fig. 12. Ammotrypanella arctica, n. sp. Enlarged under a lens. 



Fig. 13. Scolecolepis Jeffreysii, n. sp. Enlarged under a lens. 



Fig. 14. Transverse section of the anterior region (shortly behind the branchice) of the same. The right 



side is somewhat distorted from imperfect preservation : em, vertical muscle ; om, oblique 



muscle; dm, dorsal longitudinal muscle ; ac, alimentary canal ; v, blood-vessel ; n, nerve-cords. 



x 90 diam. 

 Fig. 15. Papillae on the inner surface of the cuticular tissues of Travisia glandulosa. x 90 diam. 

 Fig. 16. Large papillae of one of the transverse rows, as seen in transverse section of the body-wall of the 



same, x 350 diam. 

 Fig. 17. Hook from posterior third of Chone infundibuliformis, Kroyer, from Godhavn. x 350 diam. 

 Fig. 18. Hook from the posterior third of the other Chone. x 350 diam. 

 Fig. 19. Crotchet from the anterior region of the latter species, x 350 diam. 

 Fig. 20. Anterior end of Ancistrosyllis grcenlandica. Enlarged under a lens. 



3y 2 



