PLATE XXXII. 



Figs. 44-4G. PlMELODU.S ANTIQUUS: 



Figs. 44, 45. Fragments of iieotoral spines. 



Fig. 4G. Portion of a dentary bone, seen from bouoath. 



Figs. 47-51. Phaeeodus acutus. Jaw fragments, from the junction of Big Sandy and Green Rivers, 

 Wyoming. 

 Fig. 47. Portion of tlie right xiremaxillary. 

 Fig. 48. Portion of left jiremaxillary. 

 Fig. 49. Portion of right dentary. 

 • Fig. 50. Portion of left dentary. 



Fig. 51. Portion of a maxillary. 



.Figs. 52, 53. Trygon (?). Caudal spine of a Eay, From the Miocene of Virginia. Fig. 52. Anterior view 

 of basal portion of the spine. Fig. 53. Section of the same. Belonging to Mr. C. M. Smith. 



Figs. 54, 55. Myliobates (?). Caudal spine. Found with the preceding. 

 Fig. 54. Anterior face of basal portion. 

 Fig. 55. Section of the same. 



Figs. 56, 57. Pkotautoga conidens : 



Portions of premaxillaries, with tooth, from tbc Miocene of Virginia. Belonging to C. M. 



Smith. 

 Fig. 56. Fragment of the left prcmaxillary, eoutaiuiug the lirst tooth. 

 Fig. 57. Right premaxillary, inner view, exhibiting, besides the outer row of large teeth, an 



inner row of small ones. 



Fig. 58. ACIPfiNSER ORNATUS: 



A dermal plate. From the Miocene of Virginia. Belonging to Mr. C. M. Smith. 



Fig. 59. AsTERjiCjUStTIIUS SIDERIUS: 



Basal portion of an ichthyodorulite, lateral view. 



