SIAE5H.] 



SCELIDOSAURUS. 229 



Kb restoration of the skeleton of this unique dinosaur has hitherto 

 been attempted. 1 



Compsognathus has been studied by so many anatomists of repute 

 since its discovery that any attempt to restore the skeleton to a natural 

 position will be scrutinized from various points of view. Interest in 

 this unique specimen led the writer long ago to examine it with care, 

 and he has since made a miuute study of it, as related elsewhere, uot 

 merely to ascertain its anatomy, but also to learn, if possible, what its 

 relations are to auother diminutive form. Hallopus, from a lower hori- 

 zon in America, which has been asserted to be a near ally. Both are 

 carnivorous dinosaurs, probably, but certainly on quite different lines 

 of descent. 



The only previous attempt to restore this remarkable dinosaur was 

 by Huxley when in America in 1876. He made a rapid sketch from the 

 Wagner figure, and this was enlarged for his Xew York lecture. This 

 sketch represents the animal sitting down, a position which such dino- 

 saurs occasionally assumed, as shown by the footprints in the Connect- 

 icut Valley, which Huxley examined in place at several localities with 

 great interest. 



In the present restoration of Compsognathus (PL LXXXII) the 

 writer has tried to represent the animal as walking in a characteristic 

 lifebke position. 



SCELEOOSATJRTJS. 

 Plate LX5XIII. 



The second of these restorations is that of Scelidosaurus Harrisonii 

 of Owen, shown one-eighteenth natural size on PI. LXXXIII. This 

 reptile was an herbivorous dinosaur of moderate size, related to Stego- 

 saurus, and was its predecessor from a lower geological horizon in 

 England. This restoration is essentially based upon the original 

 description and figures of Owen (Palteontographical Society, 1S61). 

 These have been supplemented by the writer's own notes and sketches, 

 made during examinations of the type specimen now in the British 

 Museum. 



Scelidosaurus is a near relative, as it were, of one of the American 

 forms, Stegosaurus, now represented by so many specimens that the 

 skull, skeleton, and dermal armor are known with much certainty. 

 The English form usually called Omosaurus is still more nearly allied 

 to Stegosaurus, perhaps identical with it. 2 



A restoration of the skeleton of Scelidosaurus by Dr. Henry Wood- 

 ward will be found in the British Museum Guide to Geology and 

 Palaeontology, 1890, p. 19. The missing parts are restored from Iguano- 

 don, and the animal is represented as bipedal, as in that genus. 



1 The remains of the embryo ■within the skeleton of Compsognathns, first detected by the writer 

 in 1881 while examining the type specimen, is not represented in the presentrestoration. This unique 

 fossil affords the only conclusive evidence that dinosaurs -were viviparous. 



* The generic name Omosaurus was preoccupied by Leidy in 1356. 



