350 



THE VOYAGE OF H.M.S. CHALLENGER. 



PLATE XXXIII. 



PLATE XXXIV. 



1. Astroceras pergamena, Lym., below, -|. The mouth angle is incorrect ; there 



are no mouth papillse, only irregular grains, 

 above, f . 

 „ „ arm joint near base of arm, j-. 



,, „ arm joint midway of arm, f. 



,, ,, arm joint near tip of arm, f . 



Astroclon propugnatoris, Lym., entire animal in profile, \. 



below, \. 

 above, \. 



arm joint near base of arm, \. 

 arm joint beyond first fork, \. 

 arm joint at tip of twig, x £. 



PLATE XXXV. 



(For further remarks on this plate, see generic descriptions of Astrophyton and Euryale.) 



Figs. 1-16. Euryale aspera, Lmk. 

 ,, 17-25. Astropliyton costosum, Seba. 

 ,, 26. Gorgonocephalus agassizii, Lym. (Marked A. costosum on the plate.) 



Fig. 1. Euryale aspera, Lmk., j-. A mouth angle with skin removed to show the large 

 side mouth shields (b), jaws (c), jaw-plate (e), mouth papillae (d), and 

 teeth (d"), under arm plate (h), side arm plate (i). 



