POLYCH^ETA BENHAM. 119 



Harmothoe abyssorum (figs. 30-35). 



Fig. 30. View of the head ( x 10). 



31. Front view of the prostomium, showing the tips of the " peaks " and the 

 relative position of insertion of the median and lateral tentacles. 



32. A cirriferous parapod (camera, X 10). 



33. A tubercle of an elytron, side and top views (enlarged). 



34. A dorsal chaeta ( X 90). 



35. A ventral chseta ( x 90). 



Eulagisca corrientis (figs. 36-38). 



Fig. 36. The head dorsal view ( X 5). The tentacles are broken off, the palps, are 

 represented as having been cut away to a greater or less amount, and the sub- 

 tentacular frontal cone (f.c.) is seen below and projecting beyond the tenta- 

 culophore. The peristomial parapod is produced into a fine point (I) between 

 the dorsal and ventral cirri. 



37. View of the head from in front ( X 5), showing the position of the frontal cone. 

 The three tentacles are seen' to lie in the same plane. The peristomium is 

 foreshortened, and only the apex of the lobe (/) and insertion of the two cirri 

 are indicated; (I) elytrophore of second segment. 



38. The second elytron ( x 10). 



PLATE 7. 



Eidayisca corrientis (figs. 39-42). 

 Fig. 39. The eleventh parapod, anterior face (x 2). 



40. One of the upper dorsal chsetae ( X 45). 



41. A ventral chseta from the middle of the bundle ( X 45). 



42. A ventral chseta from the lower part of the bundle (X 45). 



Hermaaim roucJii (figs. 43-47.) 

 Fig. 43. One of the most dorsal chsetse from a large individual ( x 45). 



44. The apex of one of the smaller dorsal chsetae from the upper part of a bundle, 

 from one of the smaller individuals ( X 250). 



45. The apex of one of the largest dorsal cheetse, much worn ( X 250). 



46. One of the uppermost chsetse of a ventral bundle of a large individual ( X 45). 



47. One of the lowermost ventral chsetae of a large individual ( X 45). 



Eulalia hunteri (figs. 48-52). 

 Fig. 48. Anterior end of the worm ( X 9). 



49. The head (x 27). Only the appendages of the right side are completed. 



50. A parapod, anterior face (camera, X 20). 



51. A chaeta ( X 250) : the appendix is not necessarily curved. The outline is too 

 heavily drawn ; it is in the object extremely fine. Note the peculiar articulation. 



52. A gioup of phaiyngcal papillae (X 35) ; three are shown from above. 



