0. C. Marsh—New Dinosaurian Reptiles. 515 
interior structure is cancellous. The chevron bones differ from 
those of most known Dinosaurs in having the superior articu- 
lar ends of the rami not united, but — from each other, 
as in the orgy with free heemapophys 
Some of the dimensions of this skeleton are as follows: 
ee of centrum of anterior ry vertebra. =. ..2 2306" 
Transverse diameter of anterior Ee ena assaf 
toevoe BOO 
Wertioal didmeter . oe ee 
Amount of convexity [ors (Serer ee aoe 
Length of centrum of lumbar vertebra. - 240° 
Transverse — of anterior Thee co52 52s 410° 
Vertical diametet - 266.3. e465) «970 
Length of eae sacral ver sane Wee WeaS ge saan wes 250 
760° 
Expanse of its waperone PIOOCRSCB fan os Hine 4 pg oat 
Length of centrum of median oie picnin ham aot oe 190° 
Length of poate CARON Sec. 6 pi ia ne i : 
This animal must have been between fifty and sixty feet in 
length, and more than thirty in height when erect. 
Apatosaurus grandis, sp. Nov. 
Another huge Dinosaur, apparently of the same genus, but 
* smaller size, is represented in the Yale Museum by the more 
mportant parts of a skeleton, in remarkable preservation. In 
thie specimen the cervical vertebrae have the walls of the cen- 
tra very thin. The caudals preserved are elongated and slen- 
der, indicating a long tail. The femur is comparatively short, 
and wit thout a third trochanter, The great trochanter 1s much 
lower than the head of the femur, and continuous with it. The 
metapodial bones indicate a foot of medium length. 
The following measurements indicate the size of the reptile : 
Length of femur - ‘Vebesn hae ae 
Transverse diameter of proximal end Fe see 340° 
Transverse diameter of distal end ___........--.--. 290° 
Length of posterior caudal vertebra iwtiate [ae 
Vertical diameter anterior Ccteclac face - oe oats 110° 
Transverse diamete ee ooo ee 
The known remains of this species are from the same geo- 
logical horizon as those above described. They indicate an 
animal at least thirty feet in length. 
——e Mee deg gen. et sp. nov. 
