as 
PLATE 26. 
1, 3, 4. Dermatodiadema horridum A. Ag. 
Actinal system of specimen measuring 20 mm. in diameter; Station 3413. 
Left posterior ambulacrum of specimen measuring 9 mm. in diameter with 6-7 pri- 
mary tubercles; Station 3364. 
Odd anterior ambulacrum of a specimen measuring 19 mm. in diameter with 7-8 pri- 
mary plates ; Station 3413. 
2. Dermatodiadema globulosum A. Ag. 
Part of actinal system of specimen measuring about 30 mm. in diameter; the right 
anterior ambulacrum extends upwards; Station 3381. 
See eee ae 
