EXPLANATION OF PLATE LX.* 

 Dodecas decacentrum, sp.no v. 



n.s.^. — Lines indicating natural size of male specimen figured 

 below, without its fifth peraeopod. 



a. S.J. — First antenna of a female specimen. 



a.i.^ . — Second antenna of a male specimen. 



l.s.'^, m.(^, m.vp.<^. — Upper lip, mandible, and maxillipeds of a 

 female. 



gn.l(^, gn.2<^. — First gnathopod and second gnathopod of a 

 female, with further enlargement of distal portion of the 

 first. 



prp.l^, prp.3^, prpJi-^t 'prp.5<^. — The first peraeopod of a female 

 with marsupial plate attached, third peraeopod of a male, 

 fourth of a female and fifth of the same specimen, in 

 attachment to the last peraeon segment, with the pleon in 

 profile. 

 Pl-'^,Pl.'^, Pl-$- — Pleon of each sex, the upper figure showing 

 that of the female in lateral view, the lower showing it 

 in ventral aspect, the figure on the left giving the same 

 aspect of the male pleon, in attachment to the last peraeon 

 segment. 

 These figures of the pleon, together with the mouth-organs and 



distal part of first gnathopod, are much more highly magnified 



than the other details. 



