11 
Institution, which possesses a skeleton of the above species of tapir from 
Equador, presented by President Moreno. 
Cranium. In addition to the generic characters mentioned at the com- 
mencement of this description, the A. eximius and T. roulini, differ as 
follows: in H. eximius there is (1) a high sagittal crest which is wanting 
in 7. roulini, T. malayanus, and approximated in 7’. terrestris. (2) The 
crest of the squamosal part of the zygoma is continuous with the lateral 
occipital crest, which is not the case in existing tapirs. ; 
Vertebre. (1) The arterial canal of the atlas is not isolated in front as 
in T. rowlint, but notches the basis of transverse process. (2) The axis 
is longer than in 7. roulind. (38) The neural spines and especially the 
metapuphyses of the posterior dorsal vertebra are more elevated. (4) The- 
ends of the centra of the lumbars are flatter, and more depressed. (5) The 
diapophyses are wider and longer and thinner and the penultimate articu- 
ates with the last by an angular process, which is not the case in 7. 
roulint. 
Scapula. (1) This bone is equal in size to that of a 7. rowlini of con- | 
siderably greater general dimensions, and is hence relatively larger. 
(2) The spine is not angulate as in that species, has a longer base, and 
longer elevated margin. (3) The neck is more contracted and (4) the 
coracoid is not recurved as in J. rowlint. (5) The sinus bounded below 
by the latter is much shallower, and not bordered above by a recurved 
hook of the margin. : . 
Humerus. (1) It is relatively smaller in H. eximius. (2) The internal 
bicipital ridge of 7. roulind is wanting. (8) The external condyle ismuch 
shorter, whence its border is nearer its trochlear rib. The radius has a 
narrower head (1), the external articular plane being shortened. (2) The 
shaft is wider with a more acute longitudinal lateral ridge medially, and 
more rounded distal end. The ulna is (1) absolutely nearly as long as in 
T. roulini, being thus relatively longer. (2) It has three weak, longitu- 
dinal ridges on a convex outer face; in 7. roulint the external face is 
divided by a very prominent longitudinal angle from the radial cotylus, 
which spreads distally, sending one angle to the upper and another to the 
lower base of the distal epiphysis. 
Carpus. This part is (1) absolutely and relatively smaller than in 7. 
roulint. (2) The pisiform is more cylindroid distally. (8) The scaphoid 
is more produced backwards on the inner side; the excavation of the 
inner side is more continued as a concavity of the.outer side of the front. 
(3) The unciform has an acute tuberosity behind ; in T. rowlind it is short, 
vertical and obtuse. (4) The trapezoides has a shorter, wider, and more 
‘swollen external face. (5) The pisiform is small and convex instead of 
being larger and flat. © 
The metacarpals (1) are absolutely and relatively smaller. (2) The 
inner (II) has a more oblique phalangeal articulation, which is short 
above and with the keel prolonged upwards instead of being as in 7. 
roulint, distal only. 
The pelvis is distinguished by the much longer plate of the ilium, whose 
extremity constitutes the crest. (1) The crest is also shorter, and more 
