STALK-EYED CRUSTACEA 255 



B. Carapace transverse, trapezoid or quadrate, with 

 the lateral margins straight ; front narrow 

 or of moderate width ; orbits consider- 

 ably developed. The fifth joint of the 

 external maxillipedes usually articulates 

 at the antero-external angle of the fourth 



^ (Jcypoaz7txc. 



joint. — ( OcypodincE^ 



Subfamily I. Carcinoplacinae. 



CarcinoplacmcE . . Miers. 



Carapace transverse, usually convex, and more or less 

 cancroid in form, with the antero-lateral margins arcuated, 

 spinose or dentated, rarely entire. Frontal region usually 

 of moderate width ; orbits rather small. The fifth joint of 

 the external maxillipedes articulates at the antero-internal 

 angle of the fourth. First pair of legs, in the adult male, 

 usually subequal, sometimes considerably elongated ; the 

 walking legs moderately slender, with their last joint 

 styliform, sometimes compressed. The abdomen of the 

 male, at the base, usually covers the whole width of the 

 sternum between the base of the last pair of legs. 



Section I. Euryplacinae. 

 Section II. Carcinoplacinae. 



SVNOrSIS OF THE SECTIONS AND THE GeNERA. 



I. The abdomen of the male does not completely cover 

 the sternum at the base. — (Sect. EtirypIacincE^ 



1. The anterior corners of the last sternal segment 

 only are exposed at the sides of the male abdomen. — 

 {Ewyplax^ 



2. A large part of the last sternal segment is exposed 

 at the sides of the male abdomen. — (Speocarcmus.) 



