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



PLATE XXVI. 



Fig. 1. Opkiacantha discoidea, Lym., below, f-. 



2. „ „ above, f. 



„ 3. ,, „ arm joints in profile, T 



,, 4. „ abnormis, Lym., below, -J. 



5. „ „ above, f. 



,, 6. ,, ,, arm joint in profile, f . 



,, 7. „ valenciennesi, Lym., below, §. 



8. „ „ above, $. 



„ 9. Ophiornitra normcmi, Lym., below, J. 

 „ 10. „ „ above, f. 



,, 11. ,, „ arm joint in profile, f. 



,, 12. Ophiothrix ccespitosa, Lym., below, \ -. 

 ,,13. „ „ above, -?-. 



„ 14. ., ,, arm joint in profile. 



PLATE XXVII. 



Fig. 1. Ophiocymbium cavernosum, Lyni., below, f. (The mouth angle is not correct : 



there should be a close line of three mouth 

 papillae on each side, and a large tentacle 

 socket within the side mouth shield.) 



,,2. ,, ,, above, f. (The upper arm plates are too 



large and long.) 



,, 3. ,, „ arm joints in profile, f. (These are drawn 



upside down.) 



„ 4. Ophiactis pectorale, Lym., below, f. 

 5. „ ,, above, f. 



6. 



7. Ophiopeza ceqtialis 



arm joint in profile, -J. 

 Lym., below, f. 



above, f. (The granulation is too spaced.) 

 9. „ „ arm joints in profile, f. 



10. Ophiambix aculeatus, Lym., below, 1 T 6 . (The side mouth shields should be 



narrower at their outer ends.) 



11. „ „ above, l 6 . 



12. ,, ,, arm joint in profile, 1 T 6 . 



