liver with its larger left lobe divided into two parts ; on raising the 

 posterior border, the yall bladder is seen as a greenish sac on the 

 right side; also the hepatic-portal vein, which enters the left lobe of 

 the liver. The stomach, an elongated white body on the left side un- 

 der the posterior edge of the liver. (3) A convoluted tube, the in- 

 testine passing from the stomach to the right and then posteriorly to 

 finally enter the pelvic cavity as an expanded rectum. It is slung by a 

 delicate membranous fold of peritoneum, the mesentery, which is 

 full of blood vessels. (4) The fat masses, long slender yellow 

 masses on each side in the dorsal part of the body cavity anterior 

 to the reproductive glands. ( 5 ) The urinary bladder, a large bilobed 

 sac ventral to the rectum (it can be inflated through the cloaca by 

 means of a blow-pipe). 



k. Cut off all the dorsal part of the liver with strong scissors, 

 cut open the body wall in the pelvic region without injuring the 

 rectum, (i) The cloaca is now 7 exposed; a bristle may be run from 

 it into the rectum. (2) Uncoil the intestine and fasten to one side 

 to expose the spleen ( a small red body near dorsal part of mesen- 

 tery). (3) The pancreas is also seen as a pale-colored compact 

 mass in the mesentery between the stomach, liver and small intestine. 

 The bile duct from the gall bladder passes through the pancreas 

 to open into the small intestine. ( 4 ) The oesophagus is a short 

 straight tube ; pass a probe from the mouth into the stomach. 



Make a drawing of your dissection to show all of these parts. 



1. Remove the stomach, liver, mesentery and organs connected 

 with it. ( i ) Posterior to the fat masses, lie th<: reproductive glands, 

 in the male yellow, rounded testes ; in the female, folded or lobed, 

 yellow ovaries ( when the eggs are nearly ready for laying, each is 

 a large sphere, light on one side and dark on the other, and the 

 lobes of the ovary are so distended by great masses of ova as to fill 

 most of the body cavity). (2) Sexual ducts: in the male, each testis 

 sends numerous small thread-like ducts, vasa-cfferentia, into the 

 kidney lying just posterior and dorsal to it. In the female the 

 oviduct is a long convoluted tube opening into the cloaca posteriorly 

 and passing forward on each side to open by a funnel into the body 

 cavity near the oesophagus. It has no connection with the ovary. 

 (3) The kidneys are elongated, red masses close to the vertebral 

 column ; on the ventral surface of each is an elongated yellowish 

 body the adrenal body. Entering the kidneys on their external side 

 are the renal-portal veins; leaving the kidneys on their mesial side 

 are the branches of the inferior vena cava. (4) Ureter, a whitish 



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