STALK-EYED CRUSTACEA 9 



d^. Legs usually slender. — {liTicrorhync/iina;.) 



e. Eyes elongated and retractile ; praeocular spine 

 greatly elongated. 



e^. Carapace oblong, prolonged posteriorly. 



^^ The fourth joint of the external maxillipedes has 

 its antero-external angle produced, lobed, or it is dove- 

 tailed into the third joint. 



e^. First pair of legs little developed. Walking legs 

 thin, with curved terminal joint. — [Stenocionopiiicu?) 



Subfamily L Leptopodinae. 



LeptopodincB Miers. 



LeptopodidcB (part) . . Dana, Stimpson. 

 Macropodiens (part) . . H. Milne Edwards. 



Carapace subtriangular ; rostrum simple. Eyes slender, 

 non-retractile, and laterally projecting ; praeocular and 

 postocular spines minute or wanting. Basal joint of 

 external antennae slender throughout its length. The 

 fourth joint of the external maxillipedes is truncated, or 

 elongated and rounded at its distal end ; it articulates 

 with the fifth joint at its summit, its antero-external or 

 antero-internal angle. 



The first pair of legs has the palm cylindrical or 

 inflated ; fingers acute. Walking legs slender and very 

 long. 



Synopsis of the Genera. 



A. Rostrum a long single spine. 



a. A postocular spine present. First pair of 

 legs with the palm elongated, cylindrical. 



a^. Carapace smooth. External antennae 

 concealed beneath the rostrum. — {Leptopodia.) 



b^. Carapace uneven above. Flagellum of Leptopodia. 



