*ECT. III. SPECIFIC EXAMPLES. 



some plants there . is no visible umbilicus passing 

 through the chorion and forming a sacculus for the 

 amnios, an example of which we have seen in 

 Wheat, and which Malpighi exemplifies in the 

 Laurel ;* though in this example I think there must 

 have been some mistake. 



On the 30th of June, 1808, the appearances of the 

 ovary of the common Laurel of the gardens, Laurus 

 nobilis, were as follows: The amnios had just made 

 its appearance in the upper region of the chorion which 

 now resembled a mass of transparent jelly. There 

 was no umbilicus visible upon the mere inspection 

 of the chorion even with all its transparency. But 

 when the chorion was laid open by means of care- 

 ful dissection, in the direction of its longitudinal 

 axis, the umbilicus was now discernible adhering to 

 the lower extremity of the amnios. On a transverse 

 section the chorion was also evidently perforated in 

 the direction of its axis. This seemed at first to 

 have been the perforation of its umbilicus, but was 

 found at last to be merely the canal through which 

 it passed. It seemed impractibable to extricate it 

 entire ; it was so very tender. 



On the 6th of July, I succeeded at last in ex- 

 tricating it entire, together with the amriws, when 

 the external umbilical cord was also equally visible 

 passing from the ovary into the nucleus. As I ef- 

 fected this extrication in many specimens, I can 



* In lauro iiciem occurrunt humores concreti nullo taraen iu- 

 trcedente umbilico. Anat. Plant, p. 58. 



