Azotes 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 adv'tional 

 power to its own muscles as also to those covered by this fascia n 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 

 " Novae species quadrupedum eglirium ordine" with representations of 

 a skeleton, stomach and c(scum, it may be only necessary to add, that, 

 the lungs appeared of a more dense structure than usual ; the stomach 

 simple; liver of large size; small intestines 26 inches long ; ccecum 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, 



Bobac. Arctomys Bobac, Grael. 



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- 

 brse. There was an ossification of the thoracic aorta to the extent of an 

 inch and a 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. 



Vol, V. B 



