154 THE VOYAGE OF H.M.S. CHALLENGER. 



Benthodytes typica, n. sp. 

 Fig. 7. Ventral view ; slightly magnified. 



PLATE XXVIII. 



Psychropotes longicauda, n. sp. 

 Fig. 1. Ventral view ; natural size. 

 „ 2. Dorsal view ; natural size. 



PLATE XXIX. 

 Pscyhropotes longicauda, var. fusco-purpurea, n. 

 Fig. 1 . Side view ; natural size. 



Psychropotes longicauda, var. monstrosa, n. 

 ,, 2. Side view ; natural size. 



PLATE XXX. 



Psychropotes longicauda, var. monstrosa, n. 

 Fig. 1. Ventral view ; natural size. 



PLATE XXXI. 



Oneirophanta mutaoilis, Tbeel. 

 Fig. 1. Diverse forms of calcareous plates from the body-wall ; diameter of the largest 

 ones 2 '2 mm. 

 „ 2. Calcareous rods from the dorsal processes. 

 „ 3. Spicula from the pedicels. 



Deima validum, Theel. 



, 4. Calcareous plate from the body-wall ; diameter 7 mm. 



,, 5. A piece of the same plate highly magnified, showing two distinct layers. 



„ 6. The outlines of several smaller plates from the body -wall. 



„ 7. Spicula from the ends of the pedicels. 



„ 8. Spicula from the layer of connective tissue of the body-wall outside the plates. 



,, 9. Net- shaped body from the connective tissue of the body- wall inside the plates 



Deima fastosum, Theel. 

 „ 10. A large plate from the body-wall, surrounded by a number of smaller ones 



exposed in situ; diameter of the largest one 5 mm. 

 „ 11. Apiece of a plate highly magnified, showing several distinct layers. 

 „ 12. Spicula from the ends of the pedicels. 

 ,, 13. Spicula from the tentacles. 



