Plate 134. 



I'lc. 1. II jiiiK iKi.slcridc.s zoKKjiiatlnis, t.vi)e; (iral aiiulc slidwinn' mouth iihites 

 and tlie first G adaiiibulacral plates of one side, 3 of these are obviously 

 " liroininent " plates (p) and Ijetween them are tlie alternate smaller 

 adauihulacrals, each with 1 spine (»/>), X S. I'. 4().s. 



2. Mjjxdstcr iiiedusa, type; abactinal plates from the inside, X S. '2(i. 



Same ; adambulacral plates denuded of spines ; the furrow margin is 

 toward the left; X 4. 2 ?>, c, d. Same; 3 abactinal plates, disassociated; 

 the attachment point of the spines is shown by the slight bosses on 

 the plate, X 8. 2c. Same; oral angle, with mouth plates and 2 

 adambulacral fans on either side, X 2.5. P. 454. 



3. Cnemidaster wi/villii, station 5582 ; 2 prominent adambulacral plates. 



and between them a " nonprominent " plate, X 8. 3f/. Same, 

 station 5607; 3 "prominent" and 2 nonprominent plati's ; a nonpromi- 

 nent plate, and a prominent plate without spines, X 8. l*. 480. 



4. Zoroaster inieroporus, type; the furrow projection of a prominent plate 



from the adoral side, showing 3 furrow spines. 4a. Same; a "promi- 

 nent " and a " nonprominent " plate, actinal view, X 8. P. 475. 



681 



