116 ILLINOIS STATE ACADEMY OF SCIENCE 



sues, a fact possibly correlated with the peculiar develop- 

 ment of the monster. 



The entire tracts are held within a region embraced by 

 the livers. Of these, one lies above and the other below 

 the fused viscera, the upper being slightly the larger of 

 the two. In both livers characteristic lobulation is ab- 

 sent; for each consists of a single enlarged structure 

 bearing two or three smaller lobules (Figs. 4, 5). 



Two post-cavae are present, and from their relations 

 to each other it would appear that the larger liver, more 

 dorsal in position, is of the smaller pig ; likewise the ven- 

 tral liver belongs to the larger animal. Normal mesohe- 

 pars are present, and normal gall bladders pour their 

 secretions into normal bile ducts related to their respec- 

 tive intestines. A two-lobate pancreas is fixed by 

 heavy membranes to the lobes of the larger stomach only ; 

 but normal spleens are present in both animals. Pan- 

 creatic ducts were not identified. 



URO-GENITAL ORGANS 



Normal kidneys, ureters, bladder and urethra are pre- 

 sent in the larger pig, as well as ovaries, oviducts and a 

 well-defined uterus. In the smaller animal, on the other 

 hand, two pairs of greatly reduced structures lie in the 

 pelvic region, and it is entirely probable that these re- 

 present rudimentary kidneys and sex glands. Neither 

 ureters nor reproductive ducts were identified in the 

 smaller animal; but the presence of genital arteries and 

 veins as well as renal arteries suggest the identification 

 of these structures. Microscopic identification has not 

 yet been made. There are no external genitalia upon 

 the smaller animal. 



CIRCULATORY SYSTEM 



Differing from the hearts of the animal described by 

 Carey (1917), this monster has two hearts of approxi- 

 mately equal size, each contained within its own pericar- 

 dial cavity in a normal thoracic position. These hearts 

 are both normal, and have normal relations to the main 

 circulatory trunks of its respective body. The hearts are 

 so placed that their dorsal surfaces are opposed to each 



