REPORT ON THE HOLOTHURIOIDEA. 153 



PLATE XXII. 



Oneiroplwnta mutabilis, Thdel. 

 Fig. 1. Dorsal view ; natural size. 

 „ 2. Ventral view ; natural size, a, anal aperture. 



„ 3. Ventral view of a smaller individual ; natural size, x, Stylifer infested the 

 ventral perisoma. 



PLATE XXIII. 



Benthodytes sanguinolenta, n. sp. 



Fig. 1 . Ventral view ; natural size. 



PLATE XXIV. 



Benthodytes sordida, n. sp. 

 Fig. 1. Ventral view ; natural size. 

 ,, 2. Dorsal view ; natural size. 



PLATE XXV. 



Benthodytes mamillifera, n. sp. 

 Fig. 1. Dorsal view ; natural size. 



Benthodytes sanguinolenta, var. marginata, n. sp. 

 ,, 2. Ventral view ; natural size. 



PLATE XXVI. 



Euphronides depressa, n. sp. 

 Fig. 1. Dorsal view ; three-fourths the natural size. 

 „ 2. Ventral view ; three-fourths the natural size. 



PLATE XXVII. 



Psychropotes longicauda, n. sp. 

 Fig. 1. Side view ; natural size. 



Psychropotes loveni, u. sp. 

 ,, 2. Ventral view ; natural size. 

 „ 3. Side view ; natural size. 

 ,, 4. Dorsal view ; natural size. 



Benthodytes selenkiana, n. sp. 

 ,, 5. Ventral view ; natural size. 

 „ 6. Dorsal view ; natural size. 



ZOOL. CHALL. EXP. — PART XIII. (1818.) Jf 20 



