47 (44) Carpus with mesiodistal spine; abdomen of male triangular 48 



47 (44) Carpus without mesiodistal spine; abdomen of male T-shaped Callinectes A 



B 



Figure 83.— Carpus of portunid right cheliped; A, Portunus; B, Callinectes. 



A (47) Front with 2 prominent, broad based, contiguous, triangular teeth between 

 inner orbitals; frontal teeth occasionally with rudimentary submesial teeth 

 on inner slopes C. sapidus 



Figure 84. — Callinectes sapidus, frontal and orbital regions. 



A (47) Front with 2 prominent teeth between inner orbitals separated by flattened 



space bearing pair of rudimentary submesial teeth C. similis 



10 



i i 



Figure 85. — Callinectes similis, frontal and orbital regions. 



48 (47) Front with 2 bifurcated teeth between inner orbitals; fissures on orbital margin broad- 

 ly open; color light brown, thickly covered over dorsal surface with small white spots, 

 reticulate pattern persisting in alcohol Arenaeus cribrarius 



■"■■'■■ ?f°°o^?° 



10 



Figure 86.— Arenaeus cribrarius, frontal and orbital regions. 



30 



