544 PHILOSOPHICAL TRANSACTIONS. [aNNO IJQS. 



through the membrane to which the lateral canals are attached : ii, the fallopian tubes, forming 2 

 oval swellings before they enter the uterus ; kk, the course of the fallopian tubes ; 1, the ovarium 

 of one side, slit open ; m, the othar ovarium, with the fimbriae spread over it ; nn, the ureters, 

 passing to the bladder behind the uterus. 



Fig. 5, the false belly, in the virgin state, containing the 2 mammae, each of them having 2 

 nipples, scarcely projecting above the surface. The lining of the bag has a dark-coloured cuticle, 

 thinly covered with a short hair, except at the root of the nipples, where there are tufts of some 

 length. 



Fig. 6 and 7 represent the vagina exposed in the same manner as in the former drawing, to show 

 its appearance. The first is during pregnancy ; and an orifice is seen close to the meatus urinarius, 

 which leads to the uterus, and is not to be found in the virgin state. In the 2d this orifice is so 

 much enlarged as almost wholly to conceal the passage to the bladder : it puts on tliis appearance 

 immediately after parturition. 



Fig. 8, an anterior view of the uteras and its appendages, immediately or a short time after par- 

 turition, a, the portion of the urinary bladder ; bb, one of the canals leading from the vagina to 

 the uterus ; cc, the other canal, laid open ; dd, the cavity of the uterus ; ee, the openings of the 

 fallopian tubes ; ff, a ridge made by a fold of the internal membrane ; g, the remains of a corpus 

 luteum in the ovarium ; h, an uncommon number of blood-vessels going to tlie oval glandular en- 

 largement of the fallopian tube ; iiii, the ureters, terminating in the bladder. 



Fig. 9, the foetus ot a kanguroo found in the false beUy, represented of half its natural size ; 

 weighing only 21 grs., and the smallest that has been ever discovered. It is probably in the earliest 

 state ; as the mouth had little if any hold of the nipple. 



Fig. 10, the part of the foetus found in the impregnated uterus. 



Fig. 11, the foetus, after having become attached to the nipple. 



Fig. 12, the nipple, to show how far it had been in the mouth. 



Fig. 13, the foetus a little further advanced, and the tongue, concave on its upper surface, adapted 

 to the nipple. 



Fig. 14, tie foetus still larger, the hind legs having acquired their natural proportion to the other 

 parts. 



Fig. 15, a view of the pelvis of j tlie natural size to show tlie situation of the 2 bones belonging 

 to the false belly, aa, the 2 bones, one in its most common position, the other bent down, to show 

 the extent of its motion ; b, the projection of the bones of the pubis, on which the 2 small bones 

 move ; c, a ligament, connecting the small bones to the ramus of the os pubis ; d, a projecting 

 rounded convex surface, over which the pudendum is brought forward, to allow of the foetus being 

 deposited in the false belly. 



J[. On the Change of Animal Substances into a Fatty Matter much resembling 

 Spermaceti. By George Smith Gibbes, B. A. p. 239. 



In a paper which the k. s. have done me the honour of inserting in the last 

 volume of their Transactions, I related some experiments on the decomposition 

 of animal muscle. I mentioned in that paper, that the substance procured 

 either by means of water, or the nitrous acid, appeared to have precisely the 

 same external characters; but I have observed since, that there is a difference 

 between that which is obtained from quadrupeds, and that which is procured 

 from the human subject; the former seems not disposed to crystallize, while the 

 latter assumes a very beautiful and regular crystalline appearance. 



