REPORT ON THE OPHIUROIDEA. 



345 



11. 



12. 

 13. 



14. 

 15. 



16. 



17. 

 18. 



PLATE XXIV. 



Ophioscolex tropicus, Lym., below, -f-. 

 „ above, f . 



,, arm joints in profile, f-. 



dentatus, Lym., below, -f-. 

 ,, above, -f-. 



,, arm joints in profile, f . 



Ophioplinthus medusa, Lym., below, 4\ 



,, above, 4\ 



,, arm joints in profile, 4\ 



grisea, Lym., below, -f- (The division of the mouth is a fracture 

 and not constant.) 

 ,, „ above f. (The originals of 0. medusa and 0. grisea, 



were covered with a thick skin, but were partially 

 dried to exhibit the plates.) 

 ,, ,, arm joints in profile, £. 



Ophiochiton fastigatus, Lym., below, f. 



above, f . 

 „ ,, arm joints in profile, *. 



Ophiernus vallincola, Lym., below, f. 



above, f. 

 ,, „ arm joints in profile, f. 



PLATE XXV. 



1. Opli'mcaiithtt Jevispina, Lym., below, \p. 



„ above, y. 



„ arm joint from above, I / ) . 



imago, Lym., below, J. 

 ,, above, \. 



„ arm joint in profile, *_. 



longidens, Lym, below, 2 1 f) . 

 ,, above, 2 r °. 



,, arm joint from above, 2 1 °. 



rosea, Lym., below, f. 

 ,, above, f . 



,, upper, under, and side arm plates with the spines, f . 



