WILLIAMS; CRABS OF THE GENUS CALLINECTES 



Figure 17. — Callinectes sapidus Rathbun, forma acutidens: a, chelae in frontal view; b, carapace; c, abdomen and sternal area, 

 male, USNM 18630, Rio Escondido, Nicaragua; d, abdomen and sternal area, female, USNM 99848, Roca Arroyo Balizas [= Arroyo 

 de Valizes?], Uruguay; a x 0.9; b, c x 1; d x 1.1. 



705 



