Notes in Comparative Anatomy. 17 
The flexors of the legs were not inserted by single tendons, but ended 
in a broad thin tendinous expansion which enveloped on either side the 
head of the gastrocnemius and all the flexors of the foot and toes, to be 
afterwards inserted into the whole length of the tibia, giving additional 
power to its own muscles as also to those covered by this fascia in its 
course. The capsules of the joints admitted great extension. Descrip- 
tions of two species of this genus having been given by Pallas in his 
“« Nove species quadrupedum e glirium ordine’’ with representations of 
a skeleton, stomach and cecum, it may be only necessary to add, that, 
the Jungs appeared of a more dense structure than usual; the stomach 
simple; liver of large size; small intestines 26 inches long; cecum 6 
inches, curved spirally; large intestines 18 inches: the animal measured 
from mouth to anus 6 inches. It was a female with very long uterine 
cornua. The ensiform cartilage terminated in a broad flattened extre- 
mity similar in shape to the same part in the Bobac, which comes next 
under consideration. 
Bosac. Arctomys Bobac, Gmel. 
Died from the effect of a very large abscess which formed between the 
skin and pectoral muscles, confined principally to the right side. The 
ensiform cartilage, united to the sternum by a narrow neck, had a thin 
expanded heart-shaped termination, to both lateral edges of which 
muscular fibres were attached. 
The heart had a glandular substance lying upon its sternal surface, 
which surrounded its base and the primitive vessels. Two portions then 
passed backwards in the thorax attached to each side of the dorsal verte- 
bre. There was an ossification of the thoracic aorta to the extent of an 
inch anda half. Length of the animal from the mouth to the root of the 
tail 15 inches. Stomach a single cavity; liver formed of two principal 
lobes, that on the right side subdivided into three minor ones; the form 
of the gall-bladder nearly circular; small intestines 5 feet 6 inches in 
length; cecum large, filled with faecal matter ; large intestines 2 feet 10 
inches. ‘The fibres of the pubic surface of the bladder had a longitudi- 
nal and somewhat curved direction ; upon the sacral surface the fibres of 
the upper half were transverse, on the inferior half they were curved 
similarly to those of the opposite side. 
Vou, V. B 
