STALK-EYED CRUSTACEA 7 



Family I. Inachidae. 



InachidcB . . . . Miers. 



Eyes non-retractile, or retractile against the sides of 

 the carapace. No defined orbits, but there is often a well- 

 developed praeocular and postocular spine. Basal joint of 

 external antennae usually slender, sometimes moderately 

 enlarged. Rostrum simple or bifid, sometimes very short. 

 First pair of legs with the fingers never excavated at the 

 tips. Walking legs sometimes very long. Abdomen of 

 male four to seven-jointed ; two or three joints often 

 coalescent. 



Subfamily I. Leptopodinae. 

 Subfamily II. Inachinae. 

 Subfamily III. Acanthonychinae. 

 Subfamily IV. Microrhynchinae. 

 Subfamily V. Stenocionopinae, 



Synopsis of the Subfamilies. 



I. Basal joint of the external antennas slender. 



A. Basal joint of external antenna; slender throughout 

 its length. 



a. Eyes slender, non-retractile, and laterally project- 

 ing ; praeocular and postocular spine minute or wanting. 



a^. Carapace subtriangular. 



a^. The fourth joint of the external maxillipedes 

 truncated, or elongated and rounded distally; the fifth 

 joint articulates with it at the summit, at the external, or 

 at the internal angle. 



a^. The first pair of legs has the palm cylindrical or 

 inflated ; fingers acute. Walking legs slender and very 

 long. — (^Lcptopodiinc.) 



