6 STALK-EYED CRUSTACEA 



maxilHpedes articulates with the fourth at the summit, 

 at the antero-external, or at the antero-internal angle. 

 The genital appendages of the male are inserted at the 

 bases of the last pair of legs. 



Legion I. Maiinea. 

 Basil joint of external antenna; large. 



Legion IL Parthenopinea. 



Basal joint of external antenna; small. 



Legion I. Maiinea. 



Maiinea . . . Dana, Miers. 



Basal antennal joint well developed, inserted beneath the 

 eyes, and usually occupying a great part of the infra- 

 ocular space ; body elongate, rounded behind, narrowed 

 and rostrate in front. Legs of normal shape. 



Family I. Inachidae. 

 Family II. Maiidae. 

 Family III. Periceridae. 



Synopsis of the Families. 



A. Orbits not defined. 



a. Basal antennal joint slender orenlarged. — (^Inacliidcc^ 



B. Orbits defined, but incomplete below, or with 

 fissures above and below. 



/;. Basal antennal joint enlarged. — (Maiidcs.) 



C. Orbits well defined ; never incomplete below. 



c. Basal antennal joint enlarged, and forming the 

 greater portion of the floor of the orbit. — {Pcriccridce.) 



