O. C. Marsh—New Jurassic Reptiles, 503 
_ The known remains of this species indicate an animal about 
eight or ten feet in height, and herbivorous in habit. All the 
a discovered are from the Atlantosaurus beds of the 
pper Jurassic. 
Camptonotus amplus, sp. nov. 
of this foot are as follow 
Length of second metatarsal - - - - 6a SOG 
Greatest diameter of proximal end.-..--.-.-.-.-- 13 
Length of third metatarsal .......-...-...-..--. 345° 
Greatest diameter of proximal end--.-.-..--.---.-.-- 150° 
Transverse diameter of distal end OF Li : 
ength of fourth metatarsal ..---..-...-.--..---- 305° 
Length of first phalanx of third digit _.....------ 140° 
Length of first phalanx of second digit --..-_.-. -- 120° 
The remains of the present species are from a lower horizon 
in the Jurassic than those described above, but within the 
limits of the Atlantosaurus beds. 
Brontosaurus excelsus, gen. et sp. nov. 
One of the largest reptiles yet discovered has been recently 
brought to light, and a portion of the remains are now in the 
Yale collection. This monster apparently belongs in the 
Sauropoda, but differs from any of the known genera in the 
sacrum, which is composed of five thoroughly codssified verte- 
bre. In some other respects it resembles Morosaurus. The 
ilium is of that type, and could hardly be distinguished from 
walls of which are very thin. 
The lumbar vertebrx have their centra constricted, and also 
contain large cavities. The caudals are nearly or quite solid. 
The chevrons have their articular heads separate. The sacrum 
of this animal is, approximately, 50 inches (1-27) in length. © 
The last sacral vertebra is 292™ in length, and 330" in 
transverse diameter across the articular face. 
