112 EXAMINATION OF 



teen days after copulation, the head of the foe- 

 tus was large and tranfparent ; the eyes were 

 prominent ; the mouth was open ; the rudi- 

 ments of the ears appeared ; the back-bone was 

 whitifh, and bended towards the ilernum ; and 

 fmall biood-veflels arofe from each fide of it, 

 the ramifications of which extended along the 

 back as far as the legs ; The two red points 

 were confiderably enlarged, and appeared like 

 the rudiments of the ventricles of the heart ; on 

 each fide of the red points he faw two white 

 ones, which were the rudiments of the lungs. 

 In the abdomen he faw the rudiments of the li- 

 ver, which was reddifh, and a fmall body twilled 

 like a thread, which was the ftomach and inte- 

 ftines. After this, till the 31ft day, when the 

 female rabbit brings forth, there was nothing to 

 be remarked but the gradual expanfion and 

 growth of the parts which were already formed. 

 From thefe experiments, De Graaf concludes, 

 that all viviparous females have eggs; that thefe 

 eggs are contained in the ovaria or tefticles ; 

 that they cannot be feparated till they are fecun- 

 dated by the femen of the male ; becaufe, fays 

 he, the glandulous liquor, by means of which the 

 eggs are enabled to efcape from their follicles, 

 is not fecreted till after an impregnation by the 

 male. He alledges, that thofe who imagine they 

 have feen prettv large eggs in three days, have 

 been deceived ; becaule, in his opinion, the eggs, 

 though fecundated, remain longer in the ovari- 

 um, 



