254 OU. C. Marsh—New Vertebrate Fossils. 
Diplosaurus feliz, gen. et sp. nov. 
An interesting discovery recently made in the lower Creta- 
ceous, or Wealden beds, of Colorado, is a new genus of Croco- 
dilians, intermediate between the old Teleosaurian type and the 
modern Crocodilus e new genus has a head and teeth very 
similar to the latter, but with this the ancient biconcave ver- 
tebree. The present type species is based upon a nearly perfect 
skull, and a number of vertebree belonging with it. These 
pertained to an animal smaller than most existing Crocodilians. 
e of the principal measurements of this. species are as 
follows: 
ries of skull on median line - oo ere Be5e™ 
Length of skull from quadrate to end of snout __...- 275. 
Transverse diameter of premaxillaries .__.__...__._- 46° 
Transverse diameter of skull, at front of orbits ------ 90° 
Transverse diameter at ends of qunenne S  o 1 29 
omy diameter of quadrate at end .__.-..___-_- 20° 
econd species of this ci is apparently the Hyposaurus 
Vabbi Cope, which may be called Diplosaurus Vebbit. 
Crocodilus solaris, sp. nov. 
o Miocene Crocodilians are known from the Western lake- 
basins, and none have been described from the Pliocene of the 
same regions. One species, however, lived in the Pliocene lake 
east of the Mountains, and, as an indication of climate, at least, 
is well worthy of record. The remains preserved indicate an 
animal of moderate size, well protected with deeply ae bony 
plates, and probably belonging to the genus Crocodilu 
Measurements of some of the more important pasate are 
the following : 
Length of centrum of lumbar vertebre Sbcue tue Mees 
Vertical diameter of anterior articulation . eueree sed 25° 
Transverse diameter Pe ys ee ee 
oh diameter of neural ¢ dana al. _ ae tunes & 
Vertical diameter pes ni chien articulation .......--. 26° 
"Tranaverte CimQiOles Soa ce oe ee 30° 
Transverse Serta of dermal goute.. 25 4203 OH 
These specimens were found by the writer, in 1878, on the 
Niobrara 1 iver in Nebraska. 
Nanosaurus agilis, gen. et sp. nov. 
The most diminutive Dinosaur yet discovered is repececnl 
by various portions of a skeleton recently received from t 
Mesozoic deposits of the Rocky — ge sel 
indicate an animal not larger than a cat, and yet apparently 
fully adult. Most of the bones are hollow, and hen walls thin. 
