PLATE 40. 



Figs. 1-4, 6-10. Cross sections of Pachymenia abyssonim. Fig. 5, Driomenia pacifica. 



Pigs. 1, 2, 4, 7, along lines E, F, G, H, posterior end. X 25. 



Figs. 3, 6. Sections along lines A, C, anterior end. 



Fig. 5. Section of Driomenia along line H, fig. 2, pi. 3S. 



Fig S. Spines of Pachymenia abyssorum. X 140. 



Fig. 9. Section about the posterior end of gonad. 



Fig. 10. Section through body behind pharynx. 



