DOG-FISH. 



pericardium, and extends backwards farther on the left than the 

 right side. ' It consists of two lobes, which occupy a considerable 

 portion of the abdominal cavity, and embrace the other viscera 

 below. The gall bladder, of small size, is situated towards the 

 fore part of the liver, and is attached to its, right lobe. 



PANCREAS 



Is a spongy conglomerate gland, placed by the commencement of 

 the small intestine. Its duct terminates in a papilla, a short 

 ■distance from the pyloric Valve. 



KIDNEYS 



Are two elongated convoluted bodies of a whitish colour, which 

 are situated on either side of the spine, extending as far forward 

 ■as the pectoral girdle. 



The ureter, after quitting the hinder part of each kidney, 

 ■dilates into a kind of receptacle, behind each oviduct or vas 

 ■deferens, and communicating with its fellow near the cloaca,, 

 terminates, by a single urethral canal, in the cloaca behind the 

 anus. The ureters should be inflated through this opening with 

 a blow-pipe. 



GENERATIVE ORGANS. 



Male-— The testes are very small, except in the breeding season, 

 and are situated far forward in the abdominal cavity. They have 

 a capsuk^-the tunica albugineat — which sends septa into the 

 substance of the gland, which consists of the tubuli testes, 

 separated bj a small amount of connective tissue. Numerous vasa 

 ■efferentia convey the semen to the beginning of the vas deferens, 

 which, by its many convolutions, forms a large epididymis. 

 These gradually decrease as the duct approaches the cloaca, when 

 it becomes straight, and expands into an elongated receptacle, the 

 surface of the mucous membrane of which is increased by many 

 transverse folds. Posterior to the termination of the rectum, the 

 vasa deferentia suddenly decrease, and nearing one another, 

 ■communicate with the ureters. 



Female — Ovary is single, and placed symmetrically in the fore 

 part of the abdominal cavity. It is round in shape, dense in 

 structure, and relatively small. The fallopian tube or oviduct 

 opens promixally into the cavity of peritoneum, between the liver' 

 and peritoneal septum ; while at its distal end it is dilated into 

 a uterine cavity,, which opens into the cloaca, being distinct 

 from the ureters. 



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