21 



brana vitelli ; and the whole substance of the opake mass separated 

 into the flakes, granules, and globules of oil, of which the vitellus is 

 usually composed : there was not a trace of any consistent parts of 

 an embryo, nor the slightest particle of calcareous matter. 



Mr. Owen concludes his communication by a tabular view of the 

 Cephalopoda, exhibiting the external and internal characters common 

 to the entire class ; those of the several orders and families com- 

 prised in it ; and the names of the genera included in each family. 



