434 The ‘American Naturalist. [May, 
REMARKS ON THE REPTILES GENERALLY 
CALLED DINOSAURIA. ae, 
BY G. BAUR. 
HE name Dinosauria was proposed by Prof. Richard Owen (1), 
in a paper on “ British Fossil Reptiles,” read before the ninth 
meeting of the British Association, at Birmingham in 1839. In 
this order were placed the genera Megalosaurus, Hylaeosaurus, 
and Iguanodon. Already in 1830, however, Hermann v. Meyer (2) 
had placed Megalosaurus and Iguanodon in a peculiar group of 
the fossil saurians, with “ Extremitaeten wie bei den schweren 
Landsaugethieren.” Kaup (3) follows H. v. Meyer, and calls the 
order containing Iguanodon and Megalosaurus : Rieseneidechsem, 
Megalosaurier. 
Owen gave the following characters for the group he had called 
Dinosauria (/.¢., p. 102, 103): 
DINOSAURIANS, 
“This group, which includes at least three well-established — 
genera of saurians, is characterized by a large sacrum, compe 
of five anchylosed vertebra of unusual construction, by the height 
and breadth and outward sculpturing of the neural arch of the 
dorsal vertebræ, by the two-fold articulation of the ribs to me 
vertebrz, viz., at the anterior part of the spine by a head and 
tubercle, and along the rest of the trunk by a tubercle attached to 
the transverse process only, by broad and sometimes complicated 
coracoids and long and slender clavicles, whereby crocodilian r 
characters of the vertebral column are combined with al ee 
ian type of the pectoral arch; the dental organs also exhibit 
same transitional or annectent characters in a greater p~ 
degree. The bones of the extremities are of large proportional 
size, for saurians; they are provided with large medullary er 
_ties and with well-developed and unusual processes, ae 
terminated by metacarpal, metatarsal, and phalangeal bones, ™ 5 
with the exception of the ungual phalanges, more or less f 
