76 Transact lotis. — Zoology. 



The stomach extends nearly to the posterior eud of the abdo- 

 minal cavity. At about its middle it is separated from the 

 air-bladder by a rather -thin spleen. This, though dorsad of 

 the stomach, lies somewhat to the right side (fig. 13). From 

 the stomach passes off the coiled intestine, opening into 

 which are the pyloric coeca. These coeca and the separate 

 coils of the intestine are numbered and named in the draw- 

 ings of the sections (figs. 10 to 15) in correspondence 

 with the numbers and names in the figure of the enteric 

 canal (fig. 1). The cardiac division of the stomach gives off 

 (fig. 12) towards its ventral right side the pyloric division. 

 This branch passes dorsalwards and then to the posterior 

 end ; coils on itself and forms the duodenum. This, again, 

 turns and passes backwards, ending in the anus (fig. 14). From 

 fig. 10 we see that the duodenum passes to the posterior end 

 of the abdominal cavity. Both coils of the intestine lie on the 

 right side, and the pyloric coeca lie on the right and ventral 

 walls of the stomach. The disposition of the pyloric coeca is 

 shown in figs. 12 and 13 : 1 and 2 lie on the right side of the 

 stomach ; the remaining four lie ventrad of the stomach : 3, 4, 

 and 5 are shown in fig. 12 opening into the pyloric division of 

 the stomach. 



The gall-bladder and the spleen are both dorsal to the coils 

 of the intestine. The gall-bladder is posterior, and the spleen 

 anterior. The cystic duct passes over the right side of the 

 spleen, joins the hepatic ducts in the anterior region of the 

 cavity, and then passes into the intestine immediately in front 

 of the junction of the pyloric coeca. 



The right lobe of the liver extends backwards about lin. 

 posterior to the hindermost end of the stomach, lies on the 

 right side of it, and in the natui'al position of parts covers the 

 gall-bladder, spleen, and part of the folds of the intestine. 

 The left lobe is opposite to this, and extends to the posterior 

 end of the abdominal cavity. In its natural position it covers 

 the whole of the ahmentary organs. The middle lobe lies 

 immediately ventral to the stomach. 



The liver, with its three lobes, completely surrounds the 

 gullet. The middle lobe however is short, and in the region 

 of the stomach the viscera are bounded laterally but not ven- 

 trally by the liver. 



The organs of reproduction lie in the posterior part of the 

 abdominal ca\dty, rather towards the left side (figs. 10 and 14). 

 They lie below the air-bladder, and pass forwards to the 

 ■dorsal region of the stomach. 



The heart, in its pericardial cavity, is at the ventral anterior 

 part of the body, and separated from the abdominal cavity by 

 a vertical partition. 



The sinus vanosiis occupies the posterior and ventral region 



