128 O. C. Marsh—New Tertiary Mammais. 
Measurements. 
Antero-posterior extent of last three molars,_..---- .--- 52.598 
Antero-posterior Sane of last lower molar, 5 sotahie sh Sik 1°75 
‘rameverse GmMeter, so 58 oso on acd an 4 Sel sues i: 
Antero-posterior pacliee of penultimate lower molar,.. 1°85 
LTBDAV OLAS  SUMINEIOR, nc wn on hs nk a wh a slbid aaa oth a 
Depth of jaw below last DROIBT sac). ia odoawur. Lagos 2 
The remains on which this species is based were found by 
the writer, in September last, near ong Fork, Wyoming. 
ane formation is Hocene, or lower Mioce 
Nyetitherium priscus, sp. nov. 
A somewhat larger species, apparently of the same genus, 
is indicated by part of a lower jaw, with the penultimate molar 
perfect. The jaw is less compressed, and the tooth proportion- 
ally se od than in the above species. There is no external 
basal ridge 
Measurements. 
Antero-posterior extent of last three lower molars, -- ---- 55 Pe 
t cayahed alge a Cisasten of penultimate lower pon Sieg 2° 
Transverse diameter,..-..--.----.--- 15 
Depth of eee tone last molar, - - - - - 2.5 
This interesting specimen was found by Mr. G. G. Lobdell, 
Jr., last autumn, at the same locality as the preceding species. 
Talpavus nitidus, gen. et sp. nov. 
small insectivor, apparently allied to the moles, 1s 
well regheeanitad by several fragments of lower jaws with teeth, 
ats pais by some isolated upper molars. T'wo character- 
specimens of these remains were found together, and 
deciles! alan ied to the same animal, which was about the 
size of a mouse. One of these is part of a lower j asst containing 
the first and second true molars; the other is an anterior 
portion with only the last premolar in spaibiens The lower 
molars resemble assesses # those of Zalpa, but on the inner 
side are more like those of Scalops: they have no external 
basal ridge. The lower ‘awe are more Bete Ne and compr 
than those in most recent insectivors. The last premolar is 
compressed and pointed. 
Measurements. . 
Antero-posterior extent of first two lower molars, --- - - -- Messe 
Antero-posterior diameter of Reneb nate lower molar,_. 1°5 
Depth of jaw below penultimate molar, ----..--.-~---- 2° 
Depth of jaw below last lower eine 2° 
The type specimen of this species was found by the writer, 
in ‘Sopanber ast near Henry’s aos Wyoming. o 
‘ale College, New Haven, July 1 ss 
