SCELID S ATJEID M . 181 



longer than tibia, the latter being nearly the length of the humerus ; 

 astragalus distinct from tibia ; metatarsals short and not inter- 

 locking ; four functional digits in pes, which was probably planti- 

 grade. A dermal armour in the form of scutes and spines. 



Genus SCELIDOSAURUS, Owen 1 . 



The type genus. The teeth (fig. 33) strongly serrated; tibia 

 rather shorter than the humerus ; posterior chevrons not antero- 

 posteriorly elongated ; dermal spines forming short subsymmetrical 

 cones, slightly compressed, with convex sides and fore-and-aft ridges. 

 Preacetabular process of ilium vertically compressed. 



Fig. 33. 



Scelidosaurus harrisoni. — An upper tooth ; from the Lower Lias of 

 Dorsetshire, f. 



Scelidosaurus harrisoni, Owen 2 . 



The type species. The larger specimens indicate an animal of 

 considerable size. There are four sacral vertebras. 

 Hob. Europe (England). 



All the following specimens are from the Lower Lias of Dorsetshire. 



R. 1111. The skeleton, almost entire except the extremity of the 

 {Fig.) skull ; from Charmouth. The skull is figured by Owen in 

 his ' Liassic Eeptilia,' pt. i. pis. iv.-vi., and the remainder 

 of the skeleton in pt. ii. pis. i.-xi. This specimen indicates 

 an individual much smaller than the type, its total length 

 being about 11 feet 3 inches. Purchased, 1865. 



39517. An imperfect anterior caudal vertebra ; from Lyme-Regis. 



Purchased, 1S66. 



1 ' Encyclopaedia Britannica,' 8th ed. vol. xvii. p. 150 (1859). 



2 Liassic Eeptilia (Hon. Pal. Soc), pt. i. p. 1 (1861). 



