List of Figures. 



carrikeri 



Lateral views of the thirteenth and fourteenth dorsal vertebrae of P. 



carrikeri 



Lateral views of the second and third lumbar vertebrae of P. carrikeri 



Lateral views of the fourth, fifth, and sixth lumbar vertebne of P. carrikeri 



Dorsal and lateral views of caudal vertebrae of P. carrikeri 



External view of left scapula of P. carrikeri . 



Anterior and posterior views of humerus of P. carrikeri 



Dorsal view of sacrum and pelvis of P. carrikeri . 



Lateral view of sacrum and pelvis of P. carrikeri . 



Ventral view of sacrum and pelvis of P. carrikeri. 



Internal and posterior views of femur of Promerycochwnts 



Anterior view of tibia and fibula of Do. . 

 Lateral view of mandible of Promerycochwrus vantasselensis 

 Scaphoid, trapezoid, and metacarpals of Do.. 



Side and ventral views of pelvis of Do 



Dorsal view of pelvis of Do 



Dorsal and plantar views of pes of Do 



Dentition of Pygopristis denticulatus .... 

 Premaxillary and mandibular teeth of Rooseveltiella notaht 



Dentition of Pristobrycon calmoni 



Dentition of Serrasalmo elongatus 



Dentition of Serrasalmo spilopleura 



Dentition of Serrasalmo maculatus 



Dentition of Serrasalmo rhombeus 



Dentition of Serrasalmo humeralis 



Dentition of Serrasalmo humeralis gracilior . 



Dentition oi Serrasalmo bratidti 



Dentition of Piaractiis nigripinnis 



Enlarged teeth of a young specimen of Myleus pacu . 

 Dentition of a large specimen of ilfWez<5 /)acM. 



Dentition of Myloplus micans 



Dipnoan dental plates from the Upper Devonian of Colorado. Syntheto- 



dont type of crushing plate. Dipterus digitatus Eastman; D. 



mordax Eastman; D. pectinatus Eastman 



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