[?*] 
in the Liver, and tending downwards, joins itfelf to 
the Pancreatic Dad ; and thefe two, fo united together, 
form a Canal or common Dud, about four or five 
Lmes long, before they difeharge their Contents into 
the ‘Duodenum . From whence it appears, (fays Dr. 
De la Motte ) that the f Porpefs has always a Dif- 
eharge of Bile into the Duodenum , though ’tis but 
thin and diluted, and fuch as in other Animals is ufu- 
ally called Hepatic Bile. 
In diflfeding the Os Petrofum, feveral Worms were 
found : Some of thefe Mr. AV^hasprefentcd us with 
a Figure of, as aifo of the Parts of Generation proper 
to the Male Porpefs , and laflly the Thoracic Dud in 
its natural Dimenfions. 
Our ingenious Author concludes with fome Obfer- 
vations made on the Heads of two Rata of an un- 
common Species, and which he fays are no-where 
deferibed. He gives us the Figures of the Auditory 
Organs, with the Jaw of one of thefe Fifh very ac- 
curately depided in his vi th Table. 
And having conftder’d the Auditory Organs, with 
the Seat of them both, in the Cetaceous, Car- 
tilaginous, and Spinofe Kinds of Fifhes, it appears, 
fays our ingenious Author, that thefe Lapilli or Ojji- 
cula differ from one another both in Strudure and 
Subftance ; for in Cetaceous Fifhes, whofe Skeletons 
are truly bony, and which, in certain refpeds, may 
be compared to truly Lignous Trees, both the Os 
Petrofum , and Auditory Organs, are in thefe, as in 
other Animals, perfedly ojfeous or bony : Whereas 
the Cartilaginous Fifh, whofe Skeletons are Elaftic 
and Cartilaginous, they may be compared to the 
Keratophyta Sped* of Sea-Plants j and thefe Fifh, 
inflead 
