Puatr XCV. 
Fig. 1. Naseus nuchalis Agassiz. C. M. Cat. No. 4454. xiI/1. 
Fig. 2. Ephippus oblongus Agassiz. C. M. Cat. No. 52388. 1/1. 
Fig. 3. Pyenodus gibbus Agassiz. C. M. Cat. No. 4480. x 1/1. 
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