242-0. C. Marsh—Notice of New Dinosaurian Reptiles. 
The only remains of this monster at present known are in 
the Yale College Museum. They are from the Upper Jurassic 
of Colorado. 
extend below the inferior surface of the centra. The latter 
are also more fully ossified than in Atlantosaurus. The first 
Vv 
ve. 
The present species is represented by various remains, the 
Eran Gth of waereie it Soe = ee ti is ARS ays Sy 535°" 
Transverse diameter of anterior articular face....__..... 215° 
Transverse diameter of posterior articular face..._....... 190° 
Expanse of transverse processes of second vertebra ------ 395° 
science is indebted for many important discoveries in the 
Rocky Mountain region. : 
Allosaurus lucaris, sp. nov. 
The peculiar genus named by the writer Allosaurus proves 
to be very different from the Dinosaurs found with it, and to 
excavated that only a narrow keel is left below, and there are 
large cavities in the interior. The length of this centrum is 
9mm ; the vertical diameter of the anterior face, 81-°™™; and 
the width of this face, 33™, The articulation for the rib is at 
the anterior border, just below the suture of the ait 
his speci he 
Mountains, and belonged to a reptile eighteen or twenty feet 
in length. 
