vi List of Plates. 



XXVI. Chilodus punctatus; Tylobranchia maculosa; Leporinus friderici; 



Pcecilobrycon ocellatus; Aphyocharax erythriirus; Brycon falcatus; 



Astyanax {Pcecilurichthys) bimaculatus; Bryconamericus liyphes- 



sus; Creatochanes affinis. 

 XXVII. Creatochanes melanurus; Hemigrammiis orthus; Afosnkhaiisia 



oligolepis; Telragonopterus chalceus; Chalceus macrolepidotus; 



Chalcinus rotundatus; Serrasalmo rhomheus; Myleus ruhripinnis. 

 XXVIII. Charax gibbosa; Hoplias macropthalmus; Barbus chola; Hoplery- 



thrinus unitceniatus ; Eryconcethiops microstoma; Hydrocyon 



forskali; Sarcodaces odoe. 

 XXIX. Mounted skeleton of Platigonus leptorhinus Williston. 



XXX. Catopterus gracilis Redfield. 

 XXXI. Catopterus gracilis Redfield. 

 XXXII. Head of Semionotus micropterus Newberry (?) Pristisomus latus 



A. S. Woodward. 



XXXIII. Group of skeletons representing three specimens of Promery- 



cochwrus carrikeri Peterson. 



XXXIV. Diagram of quarry showing position in which skeletons of P. 



carrikeri were found. 

 XXXV. Articulated skeleton of Promerycochcerus carrikeri. 

 XXXVI. Full relief model of Promerycochcerus carrikeri. 

 XXXVII. Models of Promerycocharus carrikeri representing the animals at 



rest. 

 XXXVIII. Skull of Promerycochcerus carrikeri. 

 XXXIX. Views of manus, pes, calcaneum, and astragalus of Promery- 

 cochcerus carrikeri. 

 XL. Dorsal and palatal views of cranium of Promerycochcerus vantas- 



selensis Peterson. 

 XLI. Dorsal and palatal views of P. chelydra Cope. 

 XLII. Side view of cranium of Promerycochcerus chelydra Cope. Side 

 view of cranium and lower jaw of Merycochwrus (?) proprius 

 Leidy. 

 XLI 1 1. Skull of Bison crassicornis Richardson. 

 XLIV. Pygocentrus piraya (Cuvier). 

 XLV. Rooseveltiella niger (Miiller and Troschel). 

 XLVI. Rooseveltiella altus (Gill). 

 XLVII. Pristobrycon calmoni (Steindachner). 

 XLVI 1 1. Serrasalmo hollandi Eigenmann. 

 XLIX. Serrasalmo spilopleura Kner. 



L. Serrasalmo humeralis Cuvier and Valenciennes. 

 LI. Serrasalmo brandti Reinhardt. 

 LI I. Colosoma mitrei (Berg). 



