EXPLANATION OF PLATE XLVIIL 



Fig. 1. Base of pectoral spiue of Pelecojikriis chinirgus, (lisi)lQyiDg the stout (a, h) and sleiidcr (c, d, c) 

 basilar bones, witb fossaj for tbe iuuer ones; /, eoraeo-clavicular foramen. 



2. Base of pectoral spine of FtJecoptcrus perniciosus ; lettering as in the preceding iignre. 

 Figs. 3-8. Erisichthe nilida, Cope, probable maxillary, premaxillary, and other bones. 

 Fig. 6. Distal end of dentary bone, from onUside; a, from above. 



7. t Hyomandibular bone. 



