STALK-EYED CRUSTACEA 115 



Family I. Cancridae. 



Cancridci; Miers. 



Cancridcs and Eriphidcu . Dana. 



Cancericns H. Milne Edwards, A. 



Milne Edwards. 



The carapace is in general very strongly curved above, 

 and raised and rounded on the edges ; its upper surface 

 only forms a sharp angle where it joins the inferior and 

 lateral portion. The sternal plastron is almost always 

 as long as broad ; the last thoracic segment is much 

 smaller than the preceding segments, and is separated 

 from them by an almost straight and transverse suture ; 

 the thoracic ring corresponding to the anterior legs is 

 well developed ; the arch of the flanks is very oblique ; 

 the posterior groove is very large. 



The fourth joint of the external maxillipedes is usually 

 almost quadrilateral, and slightly or not truncated at its 

 internal and posterior angle. The first pair of legs usually 

 very large, long, and swollen ; the succeeding pairs are 

 uniform, short, and for walking, those of the second pair 

 being usually less than once and a half times the length 

 of the carapace. 



Section Cancrinse. 



CancrincB Miers. 



Cancericns arqucs I 



^ , . ,.,,-. H. Milne Edwards. 



Lanccnens quaanlatcres] 



Carapace usually convex, with the antero-lateral mar- 

 gins arcuated, and armed with lobes, teeth, or spines. The 

 front is of moderate width, and usually does not project 

 over the atennules and the bases of the antennae, which 



