Table of Contents. xi 



Page 



Genus 8. Rhamdia Bleeker 20 



16. oaxacse Meek 20 



17. laticauda (Heckel) 21 



18. brachyptera (Cope) 21 



[wagneri (Gunther)] 22 



19. hypselura (Gunther) • • • 22 



Order IV. Plectospondyli 24 



Family IV. Catostomida? 24 



Subfamily Ichthyobinas 25 



Genus 9. Carpiodes Rafinesque 25 



20. meridionalis (Gunther) 26 



2 1 . tumidus Baird & Girard 26 



22. mierostomus Meek 27 



23. elongatus Meek 28 



24. labiosus Meek 29 



Subfamily Catostominae 3° 



Genus 10. Pantosteus Cope 30 



25. plebeius (Baird & Girard) 3° 



Genus 1 1 . Catostomus Le Sueur 31 



26. sonorensis Meek 3 2 



27. bernardini Girard 32 



28. conchos Meek 33 



Genus 12. Xyrauchen Eigenmann & Kirsch 33 



29. cypho (Lockington) 33 



Genus 13. Myzostoma Rafinesque 34 



30. congestum (Baird & Girard) 34 



31. austrinum Bean 35 



Family V. Cyprinidss 36 



Subfamily Campostomatinae 4° 



Genus 14. Campostoma Agassiz 4° 



32. orna'tum Girard 4 1 



33. anomalum (Rafinesque) 4 2 



34. formosulum Girard 4 2 



Subfamily Chondrostomatinae 43 



Genus 15. Xystrosus Jordan & Snyder 43 



35. popoche Jordan & Snyder 43 



Genus 16. Algansea Girard 44 



36. tincella (Cuvier & Valenciennes) 44 



37. dugesi Bean 45 



38. rubescens Meek 46 



39. lacustris Steindachner 47 



Genus 17. Hybognathus Agassiz 4§ 



40. episcopus (Girard) 48 



41. rasconis (Jordan & Snyder) 5° 



Genus 18. Pimelocephales Rafinesque 50 



42. confertus (Girard) 5 1 



Subfamily Mylopharodontinag ■ 5 1 



Genus 19. Stypodon Garman 51 



43. signifer Garman 5 1 



Subfamily Leuciscinas 5 2 



Genus 20. Ptychocheilus Agassiz 52 



