464 
WALTORE 
[Marcu 18, 1897 
Bernissart Zewanodon in the Brussels Museum, a cast 
of which may now be seen set up in the British Museum 
of Natural History, Cromwell Road. ; 
A few detached reptilian remains from the Trias of 
America had been made known by Dr. Leidy and Prof. 
Hitchcock as early as 1854 and 1856; but in 1884, Prof. 
O. C. Marsh obtained for the Yale University Museum a 
large part of a dinosaur about 8 feet in length, and, later 
on, a smaller but most complete example, named by him 
“the age of Dinosaurs”; and if, as seems now to be the 
general conclusion arrived at concerning the age of our 
own Wealden formation—by Seward, from an examina- 
tion of the plants; by A. Smith Woodward, from the 
mammals and fishes ; by Marsh, from the reptiles—this 
deposit is also of Oolitic age, and thus another old-land- 
area must be relegated to the Jurassic, rather than to the 
Cretaceous epoch, and we may look upon /egwazedon as 
an Oolitic type. 
Fic. 1.—Restoration of Anchisaurus colurus, Marsh (25 nat. size). Tria: Sic, 
Connecticut. The reptile which is believed to have made the bird-like 
bipedal footprints upon the Connecticut sandstones. 
Anchisaurus colurus, of which five individuals were dis- 
covered, all being of carnivorous type, and the oldest 
known of the division Theropoda. Marsh feels confident 
that these and other (perhaps herbivorous) forms were the 
makers of the bipedal tracks met with in such numbers 
in the Trias of America, for of the presence of birds at 
this period we have no evidence whatever. 
Passing from the Triassic sandstones to the Jurassic 
period, we have in the various deposits from the Lias of 
Fic. 2.—Restoration of a carnivorous Dinosaur, Ceratosanurnus nasicornis, 
Marsh (,5 nat. size), Jurassic, Colorado. 
Charmouth, with its herbivorous dinosaur, Sce/¢dosaurus 
ffarrison?, to the Inferior and Great Oolite, with its 
Megalosaurus, its Omosaurus and Cetiosaurus in this 
country, represented by A/s/antosaurus, Ceratosaurus, 
Stegosaurus, Brontosaurus, Camptosaurus, Laosaurus, 
and many other well-known forms, discovered and de- 
scribed by Marsh, from the Jurassic beds of Colorado 
and Wyoming Territory, U.S.A. 
We have, in fact, in the Jurassic period, entered upon 
NO. 1429, VOL. 55] 
Fic. 3.—Restoration of Stegosaurus ungulatus, Marsh (;5 nat. size), a 
hoofed and armoured herbivorous Dinosaur from the Jurassic of 
Wyoming. (The size of the brain of S/egosausus was only x) that of a 
young alligator's, if the weight of the entire animal is considered). 
Indeed, if the Iguanodon had not been contemporary 
with the Megalosaur in the Jurassic period, we should 
have had repeated over again the mournful story of the 
poor lion, in the Roman amphitheatre, who hadn’t any 
Christian to eat ; for the carnivorous Megalosaur of the 
Oolites would, in that case, have often gone supperless to 
bed for want of his Iguanodon. 
Admitting the strong palzeontological evidence which 
has been brought forward (Geo/. AZag. 1896, pp. 8 and 
69) in favour of the Jurassic age of the Wealden beds ; 
nevertheless the age of Dinosaurs did not terminate 
until the close of the Cretaceous epoch, for Huxley 
Fic. 4.—Restoration of Brontosaurus excelsus, Marsh (y}y nat. size, length 
60 feet), a huge unarmed herbivorous Dinosaur from the Jurassic of 
Wyomi (Estimated when living to have weighed 2otons! A stupid 
slow-moving reptile, probably existing upon aquatic or other succulent 
vegetation.) 
described (Geol. Mag. 1867, p. 65) a small armed dinosaur 
(Acanthopholis horridus) from the Chalk-marl of Folke- 
stone, and Seeley has determined another (Or¢homerus 
Dolloz) from the Maestricht Chalk (Q./.G.S. 1883, p. 248); 
whilst Marsh has obtained from the Cretaceous beds of 
the Laramie, in Wyoming, most complete evidence of the 
entire skeleton of Claosaurus annectens, one of a family 
of herbivorous dinosaurs, in which the cheek-teeth are 
very numerous and arranged in vertical series, not fewer 
than 150 being present, whilst the anterior portion of 
the jaws are narrower and edentulous, but produced in 
front in a rather wider predentary bone, which was, in 
