116 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Plate 51. 



Fig. 1. Encope platytata Jackson, dorsal view, natural size. Holotype, U. S. 

 Nat. Mus. Cat. No. 324455, Station 6029a. 

 2. The same, ventral view. The dark spot in interambulacrum 4 of fig. 1 

 and in interambulacrum 2 of fig. 2 are yellow tickets that took black 

 in the photographs. 



Plate 52. 



Fig. 1. Encope megatrema Jackson, dorsal view, natural size. Holotype, natu- 

 ral size, U. S. Nat. Mus. Cat. No. 324456, Station 6030. 



2. Schizaster cristatus Jackson, dorsal view, natural size. Holotype, 



U. S. Nat. Mus. Cat. No. 324460, Station 5505. 



3. The same, ventral view. 



4. The same, side view. 



