634 STUDIES FOR STUDENTS 
Panchet group. It is known only from a few teeth having the 
same character as those of the previously described forms. 
Massospondylus is the name given to certain remains from 
the Trias of South Africa, Karroo formation, and East India, 
Panchet group, that are known from a few teeth of the usual 
recurved type and some deeply bi-concave vertebre. 
Arctosaurus is from the northern part of North America, and 
is known only from a single vertebra. 
Compsognathus from the upper Triassic of Bavaria, Litho- 
graphic Slates of Kelheim, was very similar in many respects 
to Hallopus of the Jurassic; the hind limbs were much smaller 
than the fore limbs, and the lower part of the leg showed the 
same adaptation to a leaping form of progression. The bones 
were all hollow and very compact in structure; the cervical 
vertebre were numerous, forming a long neck, to which the 
head was joined at right angles. The astragalus was very closely 
joined to the end of the tibia, much as in the birds. Many 
authors have seen in this form the direct ancestors of the birds, 
but there are still wanting certain links to join the two forms 
together. 
This closes the list of the well-known Triassic Dinosaurs. It 
will be noticed that they are all of the carnivorous type, though 
indications of a larger form of the herbivorous type are men- 
tioned by Marsh. This author says of the distribution of the 
Triassic Dinosaurs: ‘It is a remarkable fact that the seven skele- 
tons of Triassic Dinosaurs, now known from the eastern part of 
this continent, are all carnivorous forms and of small size. 
There is abundant evidence from large footprints that large her- 
bivorous Dinosaurs lived here at the same time, but no bones nor 
teeth have yet been found. In the western part of the continent 
a few fragments of a large Dinosaur have been found in strata of 
supposed Triassic age, but with this possible exception osseous 
remains of these remains appear to be wanting in this horizon.” 
Footprints ‘“‘have been discovered in the Triassic sandstones of 
New Mexico. A few bones of a large Dinosaur were found by 
Professor Newberry in strata apparently of this age in southern 
