cheliped 



antennule 

 antenna \ 

 eye 



suborbital 



thoracic sternum 



Figure 4. — Schematic drawing of braehyuran crab in ventral view ; areas of carapace indicated ; legs 

 of left side only shown ; b., basis ; cp., carpus ; ex., coxa ; d., dactyl ; end., endognath ; ex., 

 exognath ; i., ischium ; m.., merus ; p., propodus. 



Scaphocerite. — Antennal scale (fig. 2). 



Stylocerite. — Spine or rounded lobe, on lateral 

 aspect of basal article of antennules. 



Subhepatic region. — Area below the hepatic 

 region and below the anterolateral border of the 

 carapace. 



Suborbital spine. — Spine on lower rim of orbit 

 (% 2). 



Supraorbital spine. — Spine above and behind 

 orbit (fig. 2). 



Telson. — Terminal somite of the abdomen ex- 

 cept in the Brachyura. 



Tergite. — Dorsal plate of a segment. 



Thelycum. — External seminal receptacle, vari- 

 ously developed, lying on sternum of the thorax 

 and formed by outgrowths from the last and next 



to last thoracic somites. 



Urogastric lobe. — Posteromedian lobe or sub- 

 region of the gastric region ; sometimes called the 

 genital region. 



ORDER DECAPODA 



Caridoid facies either retained or greatly modi- 

 fied. Exopodite of maxilla (scaphognathite or 

 bailer) large. First three pairs of thoracic limbs 

 specialized as maxillipeds. Gills typically in sev- 

 eral series, attached to coxae of thoracic limbs, to 

 their articular membranes, and to lateral walls of 

 thoracic somites (podo-, arthro-, and pleuro- 

 branchia) ; rarely absent. Young rarely hatched 

 in nauplius stage (Caiman, 1909). 



MARINE DECAPOD CRUSTACEANS OF THE CAROLINAS 



11 



