EXPLANATION OF PLATE L. 



I'lijs. 1-4. Pdclijirlnzoriiiii caniniis, Cope, uatui'al size. 



Flu. 1. The mandibular rami, the right one with the angul ir bone entire behind, and broken in front ; 

 the left with the angnlar process broken off. 



2. The right angiihir, viewed from the outer side. 



:i. The right premaxillaiy bone, inferior aspect ; 3 a, viewed from the outer .side. 



4. Right maxillary, inner side : 4 a, same, from above. 



o. Distal part of dentary bone oi' I'achi/rliizodus lalimcniiim, Cope, fioni outer side. 



6. P emaxillary bono of Ichthyoclectcs muUideiitaliis, Cope, from within ; 6 a, same, from without. 



7. Part of the maxillary bone of the same. 



8. End of dentary bone of £ni|)0 tiepwolica, Cope. 



All the figures on this plate are of the natural size. 



