TAB. XXVII. 



Fig. 



1. Skull oi Pteroilacti/his longirodris (after Collini). 



2. Left side of the skull of Pterodactylus crassirosfris. 



3. Right side of the same skull. 



4. Restoration of the same skull (after Goldfuss). 



5. Restoration of the skull of Pterodactylus compressirostris. 



The tinted portions of fig. 5 are from the Middle Chalk of Kent, and arc in the 

 Museum of James Scott Bowerbank, Esq., F.R.S, 



