Plati ;i 



I 1..1 i.i l. Cotypc, skeleton of ray from the outside, showing actinal, lateral, and pari of di 

 plati raj to left, I; D, dorsolateral pi iperomarginals; /, i 



marginals; i i, intermarginal papular areas; I I outer and i 

 pl/ii. lambulacrals; AM, outer ends of ambulacra) ossi 



2 Cotype, portion of < !■ >r-:i 1 skeleton from coelomic surface, showing mostlj the ci 

 plates; CA R C, radial line of plate F ra\ is to the right, l- 



rype, plates "f the mouth angle. The ambulacra] i shown on the left. 



ilu> righl :irc the mouth plates and the adoral adambulai i 

 I, Cotype, adambulacral armature near middle of ra thick spini i an inner 



inal. 



arinal plat< I 11 

 i. Tj pe. an inferomargiual spine I" 



280 



