Holothurians allied to Cucumaria frondosa (GUNNeER). 611 
Explanation of Plates. 
(All the figures were drawn with the aid of an ABBE camera lucida.) 
Plate 19. 
Figs. 1—4. Oucumaria frondosa (GUNNER). 
Fig. 1. Male genital papilla with twenty-two subdivisions, of which 
one is somewhat removed from the others. 6:1. 
Fig. 2. Large irregularly square ridged perforated plate of the body- 
wall. 210:1. 
Fig. 3. End view of pedicel showing the multiple end-plate, supporting 
perforated plates with spinose projecting ends; and smaller spicules in 
profile. 135:1. 
Fig. 4 Knobbed supporting rod of the tentacle.. 210:1. 
Figs. 5—14. Cucumaria californica SEMPER. 
Figs. 5—6. Irregular perforated plates of the body-wall. 210:1. 
Figs. 7—10. Elongated rod-like perforated plates of the body-wall. 
21077, 
Fig. 11. Supporting plate of the pedicel with two-pronged base 
and spinose distal branch. 210:1. 
Fig. 12. End-plate of the pedicel. 210:1. 
Fig. 13. Supporting rod of the tentacle. 210:1. 
Fig. 14. Small round or conglomerate particles of the body-wall. 
210,2 1> 
