100 UNGULATA. 
without any instance of a gradation to the more normal structure of T. bairdi being 
discovered. ‘The cranial characters of the two forms may be thus briefly expressed :— 
1. 7. bairdi. Nasals well developed, each ossified from a single centre, separate 
throughout life, thick at their base, and articulated with one another for the 
greater part of their length. 
2. T. dowi. Nasals very small, each ossified from two centres, thin, more or less 
separated from one another by an anterior prolongation of the frontals, with 
which they become partially or entirely ankylosed before the animal reaches 
maturity. 
Concerning the external characters of the two Central-American Tapirs further 
information is still required. The young of 7’. bairdi, which has been described by Mr. 
Verrill*, and figured, though not very satisfactorily, by Mr. Sclaterf, is of a reddish- 
brown colour above, darker on the head and limbs, and irregularly marked with white 
spots and stripes, while the breast and belly are either spotted pale yellow or dirty 
white. The half-grown specimen obtained by Mr. Salvin for the British Museum, and 
figured by Gray {, is dark reddish brown, passing along the back into blackish brown, 
and on the cheeks and sides of the neck into yellowish chestnut, which in its turn 
grades into the white of the throat and breast; the chin is dusky brown, and the edges 
of the lips are pure white. It appears to me, however, to be highly doubtful whether 
this is the adult livery, and whether the species is always so “ easily distinguishable by 
the bay cheek and white breast” as Gray thought: a white throat and chest is not 
uncommon in the young of the other species of Zapirus, and there is no proof that it 
does not eventually disappear in the adult of 7. bairdt. 
In his original description of Dow’s Tapir, Dr. Gill states that Captain Dow “ was 
told by the party who gave him the skulls that the young are not marked on the body __ 
with longitudinal light-coloured stripes like KL. bairdii; and he believes that this want 
of marking is evidently constant in the young of the species found in Guatemala” §. 
Positive evidence on this question is still wanting. Mr. Sclater, in figuring (under the 
name of 7. batrdi) the young living female in the Zoological Society’s Gardens, already 
alluded to, remarks :—“ This animal, although not by any means full-grown, has nearly 
lost the spots of immaturity which distinguished our former specimen of this interesting 
species ||, received in August last; and as it also differs from the adult as figured by 
Dr. Gray 4, I have thought it advisable to have a careful figure made of it. It stands 
about 23 inches in height, and is 42 inches long, from the extended snout to the rump. 
* Amer. Journ. Science, xliv. pp. 126, 127. ft P.Z.8. 1871, p. 626, pl. 1. 
t+ P.Z.8. 1867, pp. 885, 886, pl. xlii. If the colourists have been accurate, the specimen has faded a good 
deal since the original drawing was made by Mr. Wolf. 
§ Amer. Journ. Science, 1. p. 142. || This was true 7. bairdi (cf. infra, p..103). 
{| This alludes to the half-grown specimen of 7. bairdi described above. 
