PROTASTER WHITEAVESIANUS, SP. NOV. 
FiGURE 1.—Dorsal aspect. The dorsal arm plates and the ambulacral ossicles are 
removed within the area of disc. Natural size. 
FIGURE 2.—Ventral posterior view of segment. X20. (a) Side Plate. (b) Ambula- 
cral ossicle. (c) Adambulacral ossicle. (d) Position of dorsal posterior wing of the 
ambulacral ossicle. (e) Dorsal anterior wing of ambulacral ossicle. 
FIGURE 3.—Section across two adjacent segments slightly beneath the dorsal 
surface. X 12. 
FIGURE 4.—Ventral view of part of arm and disc. The outer and right hand 
portion of arm is much worn down. X 4. 
FIGURE 5.—Side view of proximal ambulacrals and the outer plate of dorsal 
rosette. The dorsal wings of the ambulacral plates are removed. X 12. 
FIGURE 6.—Dorsal view of the extremity of an arm. Distally the covering plates 
are intact. Proximally they are more and more worn away. X 4. 
