EXPLANATION OF PLATE XXIV. 

 Nephthys polybranchia, sp. nov. 



Fig. iia. — Anterior end, dorsal view, x 56. 

 „ hb. — ist right foot, posterior view. X 100. 

 „ lie. — 2nd right foot, posterior view, setae not fully shown. a=rudiment 



of branchia. X 100. 

 „ HD.— 10th right foot, front view. X 70. 



„ HE. — 30 th right foot, front view. - Setae not fully shown. X 56. 

 ,, 11F. — Seta from posterior row of 20th foot. X 330. 

 ,, 11G. — Seta from anterior row of 20th foot. X 560. 



Nephthys oligobranchia, sp. nov. 



Fig. I2A. — Anterior end, dorsal view. The head is distorted by the extruded 

 proboscis. X 38. 

 ,, I2B. — 10th right foot, front view. X 70. 



„ I2C. — 21st right foot, front view. Setae not fully shown. X 70. 



Marphysa gravelyi, sp. nov. 



Fig. 13A. — Anterior end, dorsal view, of a small individual. X 18. 

 13B. — Posterior end, dorsal view, of a small individual. X 25. 

 13c. — Maxillae. X 25. 

 1 3D. — -Mandibles, x 25. 

 13E. — ist left foot, front view, x 100. 

 13F. — 30th right foot, front view, of a small individual, equivalent to the 



40th foot of a large individual. X 56. 

 13G. — 240th right foot, front view, of a large individual. X 38. 



