BUNOTHERIA, 
85 
appears to me also that it is impossible to frame a definition for them all 
which shall exclude the Insectivora of the present geologic period. The 
definition in question must be the following: 
Cerebral hemispheres small, leaving the olfactory lobes and cerebellum 
exposed; the surface smooth, or nearly so. Limbs ambulatory, armed with 
a greater or less number of compressed ungues. Articulation of the man¬ 
dible transverse. Molar teeth of the superior series (and usually of the 
lower) tubercular, and without continuous crests. Incisor teeth present in 
the premaxillary bone. Teeth invested with enamel. Feet Avith five digits 
(with a few exceptions). Usually a third trochanter of the femur. 
I have applied to this order the name Insectivora^ so as to avoid the 
creation of a new one. I noAV think that the latter would have been the 
better course. The name Insectivora has acquired currency as applied to 
the well-known modern group of that name, and its application to types 
of such apparent diversity as those noAv associated under a single head is 
not a convenience. I therefore propose the name Bunotheria for the order, 
and include under it the suborders Creodonta^ Mesodonta^ Insectivora^ Tillo- 
donta^ and Tmiiodonta. Further investigation Avill be necessary in order to 
determine the relations of the Prosimire to this order. The suborders are 
characterized as follows: 
Superior incisors normal, not growing from persistent pulps; canines much enlarged ; 
premolars compressed; molars more or less sectorial; astragalus not grooved 
above, articulating with cuboid and navicular ; scaphoid and lunar bones distinct; 
five toes on the hind foot. ... ... Creodonta. 
Incisors not growing from persistent pulps; molars tubercular, never sectorial; ? third 
trochanter elevated; astragalus not grooved above... .... Meaodonia. 
Incisors enlarged, simple, not growing from persistent pulps; canines reduced; astrag¬ 
alus concave or grooved above. Insectivora* 
Incisors much enlarged, growing from persistent pulps, and faced with enamel in front 
onb"; therefore scalpriform..... Tillodonta. 
Incisors much enlarged, growing from persistent pulps, the superior faced with enamel 
in anterior and posterior bands, and hence truncate’. Tceniodonta. 
The order of Bunotheria with these subdivisions is not more hetero¬ 
geneous than that of the Marsupialia, and presents a great similarity 
in its component parts. Thus the Creodonta resemble the Sarcophaga, the 
Insectivora the Bntomophaga, and the Tillodanta the Bhizophaga. Phasco- 
* Linn., Bonap., Gill. The typical Insectivora. 
