EXPLANATION OF PLATE {IV) 7. 



Nereis Culveri m. s2). 



Page 140. 

 Fig. 31. Ordinary seta, outer part, X 450. 

 Fig. 32. Falcate seta, outer part, X 450. 



Nereis tridentata 7i. sji. 

 Page 142. 



Fig. 33. Head, proboscis, and buccal segment, X 40. 



Fig. 34. Proboscis, ventral view, X 40. 



Fig. 35. Foot from first setigerous segment, X 120. 



Fig. 36. Foot from anterior segment, X 60. 



Fig. 37. Foot from posterior segment, X 60. 



Figs. 38, 39, 40. Setae of different form, X 450. 



GONIADA SOLITARIA n. Sp. 



Page 146. 

 Fig. 41. Foot from tenth segment, from behind, X 60. 

 Fig. 42. Foot from twenty-eighth segment, from behind, X 60. 



