16 



Dinosauria — Anchisauridcc, etc. 



Teratosau- 

 rus. 



Megalosau- 

 rus. 



Table-case, 

 No. 14. 



Wall-case, 

 No. 4. 



Drypto- 

 saurus. 



Meg-alosau- 

 rus. 



Wall-case, 

 No. 7. 



ISTumeroiis other fine Dinosaiirian remains ai-e to be seen in 

 the collection, but as we do not know the teeth of many of these 

 huge reptiles, we cannot speak positively as to their habits. It 

 is certain, however, that, from the Trias to the Chalk, two groups 

 have existed, one having a carnivorous dentition, and the other 

 being hei'bivorous. Teratosauims of the Trias of Stuttgart, 

 Ceratosanrns and Allosaurus of the American Jurassic rocks, 

 Megalosaurus and Compsognathus of the Oolitic and Wealden 

 strata were all carnivores. 



The actual counterpart and casts of the maxilla and 

 premaxilla and a portion of the ramus of the lower jaw 

 of Megalosaurus fi-om the Inferior Oolite, Sherborne, Dorset, 

 may be seen in the Wall-case. Of Polacanthus, Oynosaurus, 

 and Ilylfeosauriis, we have no direct dental evidence, but 

 judging from a comparison of the other portions of their 

 skeletons, they have been referred to the family of the 

 Stegosatmdce. No doubt, as amongst the Mammalia at the 

 present day, the majoiity w^ere vegetable- feeders, and the 

 minoiity were p]*edaceoiis in habit. The Cretaceous genus 

 Dryptosaicrus, and the Jurassic Ceratosatirns and Allosaurus 

 were, in America, the representatives of the cai-nivorous 

 Megalosaurus of our Secondary rocks. 



Many species of Uryptosaurus have been identified, and a 

 series of plaster-casts of bones of Dryptosaur^is aquilunguis are 

 exhibited in the case. 



Anchisaurid.'E. — The genus AncMsauriis has amphica'lous 

 cervical vertebrae, the pubis is i-od-like, there are five digits in 

 the manus and pes. The teeth are without serrations on the 

 anterior border. Epicampodon (Fig. 18, A, B, c) is an allied 

 O'enus from India. 



Fig. 18.— Fragment of mandible, A, lateral aspect; £, posterior aspect ; C, section of 

 tooth of Epioimpoilon indicas (Huxley i. from the Panchet beds (U. Trias), Lower 

 Gondwanas of Bengal : I), lateral aspect of tooth of TUecodcniosaurus pUUi/oUuu 

 (Riley & btutchbury), Upper Trias, Bristol. 



