Revision of the Holothurioidea. 357 
Explanation of plate. 
All the figures were drawn with the aid of an ABBE camera lucida, 
from preparations of Oucumaria frondosa (GUNNER). 
Date 13. 
Fig. 1. Adult female. Dorsal view, introvert extended. The genital 
papilla appears in the mid-dorsal line, just back of the contracted tentacles. 
At the base of the introvert four or five pedicels in each of the two 
lateral dorsal, and the two lateral ventral, radii, are partly extended, but 
most of the pedicels are deeply retracted, leaving pits in the wrinkled 
skin. The anus marks the posterior end of the body. Natural size. 
Fig. 2. Female genital papilla. 8:1. 
Fig. 3. Female genital papilla with three subdivisions, 7:1. 
Fig. 4. Male genital papilla, subdivided into seven lobes, each bifid, 
and with two terminal pores. 8:1. 
Fig. 5. Reconstruction of the male genital papilla represented in 
Fig. 4. The end of the vas deferens, vd, with its bifurcated terminal 
tubules, a—9, is shown. 8:1. 
Fig. 6. Ventral view of a young specimen with tentacles and pedicels 
partly extended. 9:1. 
Fig. 7. Dorsal view of specimen shown in Fig. 6. Six pedicels 
appear in each lateral dorsal radius, and none in the mid-dorsal inter- 
radius. The anus lies dorsally, near the posterior end of the body. 9:1. 
Fig. 8—11. Stages in the development of the perforated plates. 
10:1. 
Fig. 12 and 13. Supporting perforated plates of the pedicel. 210:1. 
Fig. 14. Supporting rod of the pedicel. 210:1. 
Fig. 15. End-plate of the pedicel from a young holothurid. 210:1. 
Fig. 16—18. Knobbed and spinose supporting rods, plates and 
rosettes of the tentacles. 210:1. 
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