96 MOLLUSCA IN THE MaYA LoWLANDS 



Pl. 17 — chamidae 



a. Chama macerophylla Gmelin (Q— 501), aa (2427). 



bb. Chama congregata Conrad {4978). 



c. Chama sarda Reeve (Q— 502), cc (6133). 



d. Chama florida Lamarck (Q— 502), dd (6132). 



e,e'. Chama sinuosa Broderip (Q— 502, Q— 503). Both specimens illustrated are upper valves. 



f,f'. Pseudochama radians Lamarck (Q— 501, Q— 502). 



(Actual size) 



