PLATE LVIII6. 



Fig. 1. — Mesonyx laiiius, proximal view of proxiuial scries ol carpal bones of the riglit side of the imli- 



viilual figured in Plate XXIX; natural size. Page 356. 

 Figs. 2, 3. — Skull of Ictops fcicHspis from the Wind River Basin, Wyoming. Page 2(i6. 

 Fig. 2. — Oblique view of right side, natural size; a, left mandibular ramus, inner side. 

 Fig. 3.— Oblique inferior view, one-third larger than nature; a, left ramus of mandible, from above. 

 Figs. 4, b.—Heptodon veiitorum. Two individuals from the Wind River Basin; natural size. Page 654. 

 Fig. 4. — Left maxillary bone, with molar teeth and alveolus of canine, from below; a, from right side; 



ft, last inferior molar, lacking anterior lobe, from above. 

 Fig. 5. — Last inferior molar of a second individual, from above. 

 Fig. 6.— Right mandibular ramus oi Ueptodon calcicnlus, right side; a, from above; natural size. From 



the Wind River Basin. Page 656. 

 Fig. 7. — iamftdo<fcm«mjJo;)oa(;reMni, left ramus mandibuli. outer side: a, from above; naturalsize. Wind 



River Basin. Paga 720. 



