910 



THE VOYAGE OF H.M.S. CHALLENGER. 



" Amphion Adult " ; but this can scarcely be an adult seeing that it has only six pairs 

 of appendages attached to the pereion ; in these the branchiae are present in a more or 

 less advanced condition, existing as a single plume corresponding with each pair of 

 appendages excepting the first gnathopoda ; the plumes are attached near the middle 

 to the pleural surface of the pereion, and taper gradually to each extremity. 



Fig. 76.— Amphion with seven legs, and five pairs of branchiae ; gl, gland ; h,h, liver ; mx, maxilla ; te, te, testes. 



Reduced a half from Suhm's drawing. 



Their structure (fig. 2br) is that of a series of thin foliaceous plates resembling those of 

 the Phyllobranchiata, forming one broad plate on either side of a central stalk. 



The next specimen (fig. 76) is the most advanced that has yet been observed ; it was 

 taken with the preceding on the northern side of New Guinea, and was drawn while yet 

 in a fresh state by Willemoes Suhm, but whether it be the same as that which is given 

 on PI. CXL VII. fig. 2, I am not certain, but I believe that it is, and if so the posterior 

 pair of pereiopoda is represented much too long by Suhm. 



