2 yS Air. Home on the Structure of the Sto macks 
structures peculiar to them ; these are in the pyloric portion ; 
there are also similar glands in the stomachs of some grami- 
nivorous animals, as has been already explained. The follow- 
ing may be mentioned as instances of this kind. 
In the lynx, a glandular zone surrounds the orifice of the 
pylorus. 
In the mole, there is a similar zone. 
In the stoat, and armadillo, there is a glandular structure 
near the pylorus. 
In the sea otter, there is a glandular structure extending 
from the pyloric portion into the duodenum, described in a 
former paper. 
In tracing the gradation from carnivorous quadrupeds to 
birds of prey, it would have been natural to expect that the 
bat, which has wings, and lives on animal food, should form 
an intermediate link : this, however, is not the case ; the 
stomach of the long-eared bat resembles those of small carni- 
vorous quadrupeds ; that of the vampyre bat, which will 
be found to live on vegetables, has more the appearance 
of an intestine, and may, from its form, be mistaken 
for the caecum and colon ; in this repect it approaches the 
kanguroo, and still more closely the kanguroo rat ; its cardiac 
portion is shorter, and its pyloric longer, than in the stomach 
of that animal, and there is no valvular structure at the orifice 
of the cardia. I have mentioned these differences as there is 
no engraving of the kanguroo rat’s stomach annexed to the 
present Paper. 
The only real link between the stomachs of quadrupeds 
and birds is that of the ornithorinchus, which, however, is ; 
more an approach to the gizzard, being lined with a cuticle. 
