EXPLANATION OF PLATE XL. 



Physalidonotus paucihranchiatus, sp. nov. 



Fig. 39. — The jirostommin from above ( x 10). 



Fig. 40. — The prostomium from the side ( X 10). 



Fig. 4L — An elytron (x 8). Ant. the anterior margin. 



Fig. 42. — A portion of the surface near the external margin 

 ( X 20), showing the outer end of the areola (on 

 the right), and the filamentous tubercles on the 

 antero-external area. 



Harmothoe etheridgei, sp. nov. 



Fig. 43. — A neuropodial chseta (x 90). 



Fig. 44. — A notopodial chaeta (x 90). 



Fig. 45. — One of the uppermost notopodial cha-ta? ( X 90). 



Fig. 46. — The prostomium and anterior segments (x 10). 



Fig. 47. — The fifth elytron ( ■: 10). Ant. anterior margin. 



Fig. 48. — Tubercles of various shapes { x 45). 



Fig. 49. — The tip of a notopodial chaita ( x 360). 



Fig. 50. — Tip of a neuropodial chseta (x 360). 



Fig. 51. — A parapodium (x 20). 



Halodora, sp. incert. 

 Fig. 52. — The fifth parapodium (x 35). 

 Fig. 53. — The fourteenth parapodium (x 35). 

 Fig. 54. — The head, ventral view (enlarged). 

 Fig. 55. — The head, dorsal view (enlarged). 



Nephthys macrura, Schmarda. 

 Fig. 57. — The head (x 8), from a camera drawing. 



