168 
PEOFESSOE OWE2s' 02^ THE YEETEBEAE 
proportion to their length than in the larger species from the Greensand. The articular 
cup and ball of the centrum have the same relative position and transverse breadth. 
The hypapophysis (Jiy, fig. 39) is further from the anterior border. The neural arch has 
the same superior breadth, compared with the centrum. There seems to have been 
rather more development of the process uniting the base of the anterior zygapophysis to 
the centrum. 
The cervical vertebrae of the Pterodactylus {Dimorphodon) macronyx, from the lower 
lias of Dorsetshire, present the same type of structure. 
ExPLAJVATioisr OF Plate. 
PLATE X. 
All the figures are of the natural size, and with the exception of fig. 22 [Apteno- 
dytes patachonica), belong to the Pterodactyle ; and of these, all, save figs. 23, 38, 
and 39, are from the Upper Greensand, near Cambridge. The details are explained 
in the text. 
Fig. 
Eig. 
Fig. 
Eig. 
Eig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Fig. 15. 
Fig. 16. 
Fig. 17. 
Fig. 18. 
Fig. 19. 
Fig. 20. 
Fig. 21. 
Fig. 22. 
Front view ' 
Back view 
Under view ^ of a middle cervical vertebra, Pterodactylus SedgwicMi. 
Upper view 
Side view 
V ertical longitudinal section of a similar but more mutilated vertebra. 
Side view of a middle cervical vertebra, Pterodactylus Fittoni. 
Side view of probably fifth cervical vertebra, Pterodactylus Fittoni. 
Upper view] 
Under view I ^ i^iddle cervical vertebra, Pterodactylus Fittoni. 
Front view of sixth cervical vertebra, Pterodactylus Fittoni. 
Front view of seventh cervical vertebra, Pterodactylus Fittoni. 
Front view] „ 
Back view U ^ cervical or first dorsal vertebra, Pterodactylus Sedgioicl'ii. 
Side view jof a dorsal vertebra of a smaller Pterodactyle, until the transverse 
Front view/ processes broken off. 
Side view of a more posterior dorsal vertebra. 
Under surface ] 
Hinder surface centrum of large posterior dorsal vertebra. 
Back view of a middle or posterior dorsal vertebra. 
Under surface of the dorsal vertebra, fig. 16. 
Front view of fourth dorsal vertebra, Aptenodytes patachonica. 
