236 



THE VOYAGE OF H.M.S. CHALLENGER. 



jointed ; it is also figured as possessing the unusual feature of being furnished with hairs 

 both on the inner and outer margins. The other branch is two-jointed, the first joint 

 probably representing the terminal joints of the peduncle ; the second, that of the flagellum, 

 is tipped with four or five long hairs. 



The oral appendages and gnathopoda bear the same characteristic features as are 

 shown in the preceding figure. 



Fio. 45 (E). — Zoea of Sergestes tenuis. From a drawing by Dr. v. Willemoes-Suhm ; p b , five pairs of pereiopoda. 



The pereiopoda have now increased to five biramose pairs, of which the first is the 

 largest and the last the smallest. 



