EXPLANATION OF PLATE XL. 



Physalidonotus paucibranchiatiis, sp. nov. 

 Fig. 39. The prostomium from above (> 10). 

 Fig. 40. The prostomium from the side (x 10). 

 Fig. 41. An elytron (x 8). Ant. the anterior margin. 



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

 (> 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 chaeta (x 90). 

 Fig. 44. A notopodial chseta (> 90). 



Fig. 45. One of the uppermost notopodial chaise (> 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 ( > 45). 

 Fig. 49. The tip of a notopodial chaeta (X 360). 

 Fig. 50. Tip of a neuropodial chseta ( X 360). 

 Fig. 51. A parap odium (x 20). 



Halodom, sp. incert. 



Fig. 52. The fifth parapodium (> 35). 

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

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

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



Nephthys macrura, fechmarda. 

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



