THE E UP HA US I A CEA 



245 



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

 protopodite of two segments, a large lamellar scale or exopodite, 

 and an endopodite with three peduncular segments and a long 



FIG. 139. 

 Mcganyctiphanes norvegiea, c5, x 2. 



iflagellum. 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, 



A. 



Mouth-parts of tfeganyctiphanes norvegiea. A, mandible ; B, maxillula ; C, maxilla, e, 

 exite of first segment of maxillula ; ex, exopodite of maxilla ; i, incisor process ; m, molar 

 process ; p, palp. 



although some spines are present in the larval stages. The 

 maxillulae (Fig. 140, B) have the usual two endites and a palp 

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

 phausia 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 (e] of the first segment, sometimes erroneously called 



