Fig. 1. Reconstruction of anterior end of Pachynienia abyssorura. 



Fig. 2. Same, posterior end. 



Fig. 3. Foot, .same species, in middle of body. 



Fig. 4. Pachj-menia abyssoruni. X 3. 



Fig. 5. Spines of Driomenia pacifica. 



Fig. 6, S. Sections of Pachynienia abyssorum along lines B, D, fig. 1. X 



Fig. 7. Section of Driomenia pacifica along line G, fig. 2, pi. 38. X 50. 



