20 HJ. THEEL, PRELIMINARY REPORT ON THE HOLOTHURIDA. 
Elpidia papillosa n. 
Fig. 31. Ventral surface; natural size. 
Fig. 32: Dorsal surface; natural size. 
Fig. 33 a. Spicule; highly magnified. 
Fig. 33 b —d. Small spicula; highly magnified. 
Elpidia elongata nun. 
Fig. 34. Ventral surface; half natural size. 
Fig. 35 a. Side view of a spicule; highly magnified. 
Fig. 35 b. Upper aspect of the same spicule; highly magnified 
Deima validum n. 
Fig. 36. Side view; half natural size. 
Fig. 37. Ventral surface; half natural size. 
Fig. 38 a. Calcareous plate; highly magnified. 
Fig. 38 b—e. Spicula; highly magnified. 
