224 O. C. Marsh—New Tertiary Mammals. 
The type specimen of this species was found, last autumn, at 
Grizzly Buttes, by the writer, and other remains were discov- 
ered, at the same locality, by Mr. O. Harger. 
Paleacodon vagus, sp. nov. 
Measurements. 
Space occupied by last three upper molars,........-++.++> (pers 
Antero-posterior diameter of penultimate upper molar,....2°7 
ATAU VOrie CIMUIUER Coe Solas ees ola ec pas ee ae ke 4° 
Antero-posterior diameter of last upper molar,..........-+ 21 
EPatiCernd Ciel a ic ks shee cso es eee ea es we ees 3°6 
The only known remains of this species were found at 
Grizzly Buttes, Wyoming, by Mr. F. Mead, Jr. 
Yale College, New Haven, August 15th, 1872. 
Postscript. 
August, 1871) were published together, in pamphlet form, a0 
widely distributed, June 21st, 1871. The species there described, 
munication were issued separately as follows:—Part I, J0 
22d, 1872; Part IT, August 7th, 1872; Part II, August 13th, 
1872; and Part IV, August 17th, 1872,—the date of publica- 
tion being printed on each pamphlet. ct 
e brief descriptions here given are merely preliminary t° 
a full description, with illustrations, now in preparation. 
Yale College, August 19th, 1872. 
