PLATE XV. 



Eig. 2. 

 Fig. 3. 



rig. 4. 



Fig. 5, 

 Eig. 6. 



Fig. 7. 

 Eig- 8. 



Eig. 9. 



Eig. 10. 



Eip:. 11, (t-c 



Ophiacantha cosmica Lym. f . 



** " Dorsal side of arm. \. 



<( 



(( 



ii. 



(f 



{( 



(( 



ti 



It 



(I 



a 



Spine of the disk. Seibert Obj. II. Oc. 0. 



jjacifica Ltk. & Mrtsn. Ventral side, f 

 " « Dorsal side, f . 



" " Arm-spiues. f. 



inconspicua Ltk. & Mrtsn. Ventral side. |. 



Dorsal side. |- 



(( 



(( 



ti 



44 



(t 



n 



t 



II 



Dorsal side of arm, farther out. f . 



Arm-spines. |. 



Spines of the disk. Seibert Obj. II. Oc. 0, 



/ 



