Reviews — Qaudnfs Animal World. 



421 



footprints described as Chirotherium are really due to members of 

 this group, and inclines to the view that they were more probably 

 made by Dinosaurs. We venture to think that the interesting group 

 of Anomodonts (including the Theriodonts) are dismissed with too 

 brief a notice on pp. 178-179. In the Ichthyosauria we note with 

 interest another example (fig. 275) showing a foetus in ventre ; the 

 specimen does not, however, belong to Ichthyosaurus tenuirostris, and 

 should apparently be referred to I. acutirostris. In comparing 

 (p. 194) the structure of the limbs of Ichthyosaurus and Pliosaurus, 

 we must totally differ from the suggestion that there can be any 

 possible genetic relationship between the two genera, the former 

 having evidently descended directly from forms allied to Plesiosaurus, 

 with which Ichthyosaurus has no sort of connexion. Good figures 

 of the skulls of Nothosaurus and its allies are given on page 196, one 

 of which we reproduce in Fig. 5. We observe that the author leaves 



It. 

 or. 



Fig. 5. — Upper surface of the skull of Simosaurus Guillielmi ; from the 

 Muschelkalk. n. nares ; or. orbit; st. supratempural fossa. 5 nat. size. 



Placodus and Cyamodus in the neighbourhood of Simosaurus, some- 

 what naively confessing (p. 190) that he does not know what an 

 Anomodont or a Theriodont really is ; and thereby, in regard to the 

 latter group, merely repeating a similar confession made by a learned 

 English palaeontologist in 1880. 1 



F io . 6. — Anterior surface of the distal end of the tibia and astragalus of 

 Megalosaurus and a young Ostrich. Reduced. 



1 Quart. Journ. Geol. Soc. vol. xxxvi. p. 543. 



