I>ESCRI1>T1(>XS OF AliGlLJIU:— UJLSOX. 



653 



posterior border of the basal joints of the antennae, and the lateral 

 hooks on the first antennse are deep yellow in color and opaque; all 

 the others are traiispar(Mit and colorless. 



The eyet^ are small, lunate, and more or less inclined to the central 

 axis; they are situated well forward and widely separated. 



The sucking- disks are small, not more than one-eig-hth the width of 

 the carapace; they are situated far forward and are widely separated. 



Fig. 35.— Ventral .surface of a female ARorLCS trilineata. 



The chitin ribs, which support the membranous border, are made of 

 trough-like scales overlapping one another, very similar to those in 

 A. megalops. 



Posterior m.axillipeds. — These are large and very fidly armed, to 

 offset the slender antenna? (tig. 37). The basal joint has an oval pai)il- 

 lated area, which is placed obliquely, is elevated consideral)ly above 



