254 STALK-EYED CRUSTACEA 



Family III. Ocypodidae. 



Ocypodiacece (part) 



OcypodidcE Miers, Kingsley. 



Ocypoda Fabricius, Latrcille, Leach, 



Lamarck, Desmarest. 



Cancer Linne. 



M ac7'0phthalinid(B (part) Dana. 



Carapace usually moderately convex, cancroid or 

 trapezoidal, with the antero-lateral margins straight or 

 arcuated, but the branchial regions not greatly dilated ; 

 the front of moderate width or very narrow. Orbits and 

 eye-peduncles sometimes of moderate size, sometimes 

 very greatly developed. The fifth joint of the external 

 maxillipedes articulates with the fourth at its antero- 

 internal or, rarely, at its antero-external angle. The first 

 pair of legs in the male is usually of moderate size, 

 sometimes rather slender and very considerably elongated ; 

 the terminal joint of the walking legs is styliform, and not 

 armed with strong spines. The abdomen does not always 

 hide the sternum at the base between the base of the last 

 pair of legs. Usually found on the shore or in shallow 

 water, but may live in deep water. 



Subfamily I. Carcinoplacinse. 

 Subfamily IL Ocypodinae. 



Synopsis of the Subfamilies. 

 A. Carapace transverse, with antero-lateral margins 

 bowed ; frontal region of moderate width ; 

 orbits small. The fifth joint of the ex- 

 ternal maxillipedes articulates usually at 

 the antero - internal angle of the fourth 



joint. — {CarcinoplacincZ.) Cardnoplacincz. 



