REPORT ON THE OPHIUROIDEA. 357 



PLATE XXXIX. 



Fig. 1. OpliioUpus agassizii, Lyni., f. Exp. U. S. Str. "Blake." 

 ,, 2. ,, „ ij". Outer face of ;in arm bone. 



,, 3. ,, „ \o_ Inner face of an arm bone. 



,, 4. Oplilopyrcn longispinus, Lym., '^^ {congispinus, by error in tlie plate). 

 ,, 5. ,, „ \*. Outer face of an arm bone. 



,,6. ,, „ \*. Inner face of an arm Ijoue. 



,, 7. Ophloconis miliaria, Lym., ^^. 



,,8. „ „ ^^. Outer face of an arm bone. 



,, 9. ,, ,, ^j°. Inner face of an arm bono. 



,, 10. Ophiomusium serratuvi, Lym., ^£. 

 ,,11. „ validum, Ljn., i/*. Outer fiice of an arm bone. By error se?'ra- 



tuin in plate. 

 ,, 12. ,, „ '^f. Inner face of an arm bone. 



,, 13. ,, ,, \°. Profile view of an arm bone. 



,, 14. Opthiomastus secioidus, Lym., \®. 



,, 15. Ophiochccta mixta, Lym., Jjf'. 



,, 16. ,, ,, \2_ Outer face of an arm bone. 



,, 17. „ „ ^x- Inner face of an arm bone. 



PLATE XL. 



Ojihiopsila riisei, Ltk., \2. 



,, ,, 2_o Outer face of an arm bone. 



,, ,, 2_o_ Inner face of an arm bone. 



Opliiophragmus wurdemani, Lym., ^f. 



,, ,, \*. Outer face of an arm bone. 



,, ,, 2^*. Inner face of an arm bone. 



,, „ \^. A wing of a mouth frame showing the 



peculiar ridges on the interbrachial 

 side for the attachment of the outer 

 inter-mouth frame muscles. 



Outer face of an arm bone. 



Inner face of an arm bone. 



Disk of a very small specimen from above to 

 illustrate the first apjjearance of radial 

 shields (l) just outside the brachial primary 

 plates ((/'). 



(ZOOL. CHALL. EXP. — PART XIV. — 1882.) O 4G 



