0. C. Marsh—Discovery of New Pterosauria. 247 
it the latter, as all the wing-bones examined during the present 
investigation are clearly pneumatic. 
The dental characters of this species are at present only 
known from a single crown of a tooth, found with one series of 
the oo and from two larger and very perfect teeth 
found by themselves, which agree so closely with the former 
that they deserve notice in this connection. These specimens 
are less curved and less compressed than the teeth referred to Pt 
occidentalis, but in other respects they are nearly identical. 
leasurements. 
Greatest diameter of ulna, at proximal end,------------ a 
Greatest diameter, at distal end, -.----.-.------------- 68° 
Greatest diameter of radius, at proximal end, ---- -- ----- 2 
Transverse diameter of wing-metacarpal, at distal end, .-38°75 
Transverse diameter of shaft, at junction with condyles, -32° 
Antero-posterior extent of outer condyle, on palmar side, 34° 
ea sem extent of inner condyle, on palmar side, .35° 
fransverse diameter of proximal end of first ortpal tagesaag 
Len icular face, 32°5 
Antero-posterior diameter, at base of crown, - --- -------- 79 
Transverse diameter, sc. fs a oe ees 5° 
Length of large isolated tooth, _-.-------------------- 48° 
Antero-posterior diameter at base of crown, -------- ---- 14° 
Transverse diameter, igwisel .i-cavel. ssuvee 20-1 11°3 
Harger, of Yale College, and the writer. The localities 
were in the blue shale and yellow chalk of the Upper Cretace- 
ous, near the Smoky River, in Western Kansas. 
P ; 
the specimens appear to show several points of distinction from 
the species already describe ee 
n the metacarpal bone, the articular distal extremity 1s 
smaller in proportion to the size of the shaft which supports it, 
than in either of the species above described. In other respects 
