EXPLANATION OF PLATE XLVL 



Figs. 1-4. Ichfhyodectes ctenodon, Copo, natural size. 

 Fig. 1. Maxillary boue, from tbo outside. 



2. Dentary bone, from tbo inside. 



3. Hyomandibular boue. 



4. Cervical vertebra. 



5. Ichthjodcctes hamaliis, Cope, natural size : B, premasiUary and maxiUary bones, from tbo outer 



side ; 5 a, mandibular ramus, from tbe outer side. 

 Figs. 6-10. Icldhtjodecics prognathus, Cope : 6, tbe premaxillary, with anterior extremity of maxiUary, 

 from tbe inner side ; G a, same, from tbe outer side ; natural size. 



7. Ventral spine accompanying the same, natural size. 



8. Cervical vertebrse, one-balf natural size. 



9. Dorsal vertebrje, one-balf natural size. 



10. Terminal caudal vertebno, with articulating spines ; one-half natural size. 



11. Maxillary bone o{ Pachjrhhodus kiiigii, from tbe inner side, natural size. 



12. Three vertebrai of Anogviiiis, largest species, accompanying remains of JcMhjodictea ctenodon, 



one-balf natural size. 



13. Cervical vertebraj of a ? Portlieus, one-half natural size. 



