PLATE X. 
Ophiacantha vepratica, below ; $, 
bl above ; $. 
ss spine diagram ; $. 
cuspidata, below; 4. 
E above ; 4. 
Hs spine diagram ; 4. 
cosmica, below ; 4. 
“ above; 4. 
** spine diagram ; f 
a  disk-spine ; 3, 
Ophiolebes vestitus, below ; +. 
LI] 
“ above; 4. 
" — armespinej $ 
Ophiacantha nodosa, below ; $. 
“ above; f 
* — disk-spine stripped of skin; ۰ 
* — an upper arm-spine ; 22, 
cosmica, spine diagram ; 4. 
*  disk-spine; 3. 
i  gpine diagram ; $. 
* A disk-spine ; Af, 
cornuta, arm-joints ; T. 
rosca, arm-spines ; 4. 
* an under and a side arm-plate ; +. 
cosmica, a mouth-angle ; 4. 
'* arm-spine و‎ 4%, 
segesta, arm-spines ; 4°, 
serrata, arm-spines ; 4. 
**  disk-grain ; much enlarged. 
longidens, a mouth-angle and two under arm-plates ; 4°. 
imago, arm-spines ; 1. 
**  disk-grain ; 4°. 
levispina, arm-joint ; 4. 
BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY, 
€ 
et 
[i] 
Fig. 245. 
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Fig. 273. 
Fig. 274. 
Fig. 275. 
Fig. 276. 
