BAL.ENOPTERA ROSTRATA. 115 



the middle line of the body ; and at the lower part of the abdomen it 

 gets behind the uterus and passes on to the anus. The rectum near the 

 anus, for 4 or 5 inches, is much contracted, and appears to be glandular, 

 which part is covered by a soft cuticle 1 . The anus is very small. 



The inner surface of the duodenum is thrown into longitudinal ruges 

 or valves, which are at some distance from each other which receive 

 lateral abutments. The inner coats of the jejunum and ileum are 

 thrown into irregular rugae, which will vary according as the muscular 

 coat of the intestine acts ; yet I do not believe that their form entirely 

 depends on that circumstance ; they rather run longitudinally, and are 

 thrown into a serpentine course, when the gat is shortened by the con- 

 traction of the longitudinal muscular fibres of the gut. The colon and 

 rectum have very flat ruga? ; these seem to depend on the contraction of 

 the gut entirely. 



The length of the intestine from the stomach to the cascum was 28 1 

 yards ; the length of csecum was 7 inches ; the length of the colon 

 from the insertion of the ileum to the anus was 2| yards 2 . 



The mesenteric arteries anastomose by large branches. 



The epiploon is mostly a thin membrane ; on the right, it is rather a 

 very thin network, but on the left it is a complete membrane, and 

 near to the stomach on the left it is pretty thick in substance, espe- 

 cially between the first and other bags of the stomach. It has little or 

 no fat, excepting what slightly covers the vessels in some parts. It is 

 attached forwards all along to the lower end of the stomach throughout 

 its whole course. On the right, between the stomach and transverse 

 arch of the colon, it is attached to the root of the mesentery ; then to 

 the posterior surface of the left or first bag of the stomach, behind the 

 posterior attachment. 



The spleen is involved in the epiploon, and is very small for the size 

 of the animal. The liver is nearly the shape of the human, but I 

 believe not so thick at its base : the right lobe is the largest and 

 thickest ; its lower edge is not so sharp as in the human, and I think 

 probably not so firm in texture. The falciform ligament is broad ; there 

 is a large fissure between the two lobes in which the round ligament 

 passes. The liver from the porta to the left is very much attached to 

 the stomach. 



The pancreas is a very long flat body, having its left end attached to 

 the right side of the first cavity of the stomach ; it passes across the 

 spine at the root of the mesentery, and, joining the hollow curve of the 

 duodenum near the pylorus, it is continued along adhering to that 



1 [Hunt, Prep. No. 743.] 2 [Home, Comp. Anat. i. p. 440.] 



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