ANCHITHERIUM. Jal 
side of the outer lobes; in this course becoming dilated into a small conoidal pro- 
cess about the middle. 
These teeth are not bounded by a basal ridge internally, but portions exist ante- 
riorly and posteriorly; and in the latter position inclose a small conoidal process. 
The first upper molar of the normal series is much smaller than the others, as is 
indicated in the specimens by two small fangs, one before the other. . 
The inferior molars (X. 14-17; XI. 5-8,) also are exceedingly like those of 
Palacotherium. Their crowns are composed of two lobes placed one before the 
other, except the last of the series, which has an additional, or third lobe. The 
lobes are demiconoidal, with their outer side angularly convex and their inner side 
concave and sloping. Their summit is Y shaped; and the posterior extremity of 
this rises to the apex of a pyramidal process of the inner side of the crown. The 
anterior extremity of the summit of the anterior lobes curves to the base of the 
anterior pyramidal process, while that of the summit of the posterior lobe ceases 
upon the outer side of the same process. In the unworn teeth the apex of the 
anterior pyramidal process is indented. The third lobe of the last molar is smaller 
than those in advance, is ovoidal in form, and has a crescentic summit inclosing a 
concave fossa. n 
The inferior molars have no continuous basal ridge, but a portion exists between 
the bases of the lobes externally, in the form of a small pyramidal tubercle; at 
the anterior part of the crown; and at the posterior part of the latter, in which 
position it forms an angular process. 
, The first inferior molar, as indicated in the specimen by a single fang which it 
possesses, is a much smaller tooth than any of those in the series posterior to it. 
The species is named in honor of Prof. 8. F. Baird, of the Smithsonian Institution. 
MEASUREMENTS. 
Inches. Lines. 
Length of cranium from summit of inion to anterior extremity of ossa frontis + 
Length from occipital condyle to anterior orbital margin : : : ©. Sud: 
Length of temporal fossa 
Length of sagittal crest 
Length of ossa frontis 
Height of inion . 2 : 
Height of face at last molar alveolus : 
Height of orbit from floor to supra-orbital margin . 
Breadth of cranium at para squamose . 
Breadth of forehead at anterior orbitar processes 
Breadth at paramastoids 
1 
Sooeranwmroauanrnodcdan 
Breadth at post-glenoid tuberosities 
Breadth of hard palate at sixth molares 
Height of body of lower jaw at last molar 
Height of body of lower jaw at second molar 
Length of upper normal series of molars 
Length of lower normal series of molars 
Antero-posterior diameter fourth upper molar 
Transverse diameter fourth upper molar 
Antero-posterior diameter fourth lower molar 
Transverse diameter fourth lower molar 
Antero-posterior diameter last lower molar 
a 
SOC SC SCWON OR KE PH eH De De be ow 
~) 
