HOLLAND AND PETERSON: OSTEOLOGY OF THE CHALICOTHEROIDEA. Dail 
The type specimens (see Fig. 10), though fragmentary, plainly reveal an 
animal the metapodials of which are shorter, heavier, and more suddenly enlarged 
Fie. 10. M. matthewi sp.nov. 1, anterior view of Mt. II of right side (A. M. N. H., No. 9368); 2, ant. 
view of Mt. III of left side (A. M. N. H., No. 9077); 3, lateral view of ungual of digit II of manus (A. M. N. H., 
No. 9076); 4, superior view of do.; 5, superior view of proximal phalanx of manus (A. M. N. H., No. 9080). 
All figures 3 nat. size. 
distally than is the case in the species of Moropus found in the Lower Harrison Beds 
of Nebraska. The terminal phalanx of digit II of the manus is quite high and is 
compressed laterally to a slightly greater degree than is the case in specimens of 
M. elatus. The molar tooth of the type specimen is much worn and furnishes no 
characters of specific value. 
It is possible that the remains from the Virgin Valley, California, described 
by Dr. Merriam," pertain to this species. The material before us, however, 
represents an animal of smaller size. The description and the figure (Fig. 45a) 
of the ungual phalanx given in Dr. Merriam’s paper seems, except in size, to 
agree in every detail with the corresponding ungual of M. matthewi. From Dr. 
Merriam’s illustrations it is quite clear that the specimen from Virgin Valley has 
a broader and lower astragalus and a shorter tuber on the caleaneum than Moropus 
elatus. 
MEASUREMENTS. 
Mm 
Upper molar, antero-posterior diameter...............2..2see cece ee eeee 50 
Wppermolary transverseidiameters ... 4st o- see cssaedetcdeccs ses oases 36 
Mietatarsaleliivoreatestilemctineers serra vs crys se: Ney rater pirate ree 124 
Metatarsal II, transverse diameter of head......................0...020- 45 
Metatarsal II, transverse diameter middle of shaft........................ 31 
Metatarsal II, transverse diameter distal end...................-..00000- 48 
Ungual phalanx of Digit II, manus, greatest length....................... 147 
Ungual phalanx of Digit II, manus, greatest height....................... 87 
Ungual phalanx of Digit II, manus, greatest transverse diameter........... 37 
14 “Tertiary Mammal Beds of Virgin Valley and Thousand Creek in Northwestern Nevada,” Publ. 
Univ. California, Bull. Geol., Vol. VI, pp. 267-271 (1911). 
