THE EUPHAUSIACEA 



245 



times show sexual modifications in the male. The antennae have a 

 protopodite of two segments, a large lamellar scale or exoi)0(lite, 

 and an endopodite with three peduncular segments and a long 



Fig. 139. 

 Megan xjctiphaws norvegica, <J, x 2. 



flagellum. The mandibles (Fig. 140, A) generally have a palp; 

 the incisor process is directly connected with the molar process, 

 there being no lacinia mobilis or row of spines in the adult,' 



Kifi. HO. 

 Mouth-paits of Meganyctiphancs norvegica. A. mandibl.. ; B, niaxillula • C maxillq r- 

 pmce^s; rUr''"' "' '""'""""= '■'■■ ''''"P°''** °' "^'''^"''''= '• ineisor process M», molar 



although some spines are present in the lar\al stages. The 

 mi:allulae (Fig. 140, B) have the usual two endites and a palp 

 which is generally unsegmented, but has three segments in Bentheu- 

 j)hausm and two in some larvae. An exite of the third segment 

 (exopodite) is present in the larva, but is replaced in the adult 

 by an exite (c) of the first segment, .sometimes erroneously called 



