THE LEPTOSTRACA 



153 



incisor process is small and simple in Xehalia and Paranebalia, 

 large and toothed in Xebaliclla, and absent in Nehaliopsis. The 

 palp is large and has three segments. 



The maxillula (Fig. 88, C) has the usual two endites. The palp 

 is vestigial in Nehaliopsis ; m the other genera it is attached to 

 the distal margin but curves outwards and backwards so that the 



V\c.. ss. 



Cephalic appeniiajjcs of Xrlni! in. A, antennule ; B, maniHble ; C, maxillula ; 

 D, maxilla. (After CUius.) 



very long, slender, and indistinctly segmented Hagellum in which it 

 terminates is directed obliquely upwards along the side of the 

 thorax underneath the carapace (Fig. 87, p). 



The maxillae (Fig. 88, D) approximate in general form to the 

 thoracic limbs, except for the absence of an epipodite. There are 

 generally four endites, but the distal one is much reduced in 

 Nchalia and Paranebalia. The endopodite is divided into two 

 segments in Xehalia and, like the exopodite, is generally elongated. 



