96 



the case also with the pancreatic organ; a case more in point, asit 

 exliibits, vvithin the compass of a single class, that of FUhes, all de- 

 grees of complication. In some it seems to be altogether wanting ; 

 in others, it is rudimentarj', consisting of one or two minute cčbcu 

 appended to the pylorim ; and these, in others, increase in extent, 

 in number, in complication, by becoming branched, and eventuaily 

 form, in the Cartilagiiious Fis/ies, true conglomeiate glands. To the 

 class of MammaUa mammary glands are peculiar ; and it might al- 

 most have been expected a priori that in that class these organs 

 should be found in the various degrees of simplicity or complication 

 of which they are capable. Such appears to be the case; in Cetacea 

 they are simple ca^ca (and in this respect the glands of Monotremata 

 agree with these mammary glandsj; in higher forms they are con- 

 g'omerate, and cannot be misunderstood. 



Mr. Owen added, \vith reference to tiie niicroscopic tęst of the 

 nature of the secretion which was proposed by M.Geoftroy, that he 

 had not been able to procure either from the glands themselves or 

 the openings of their ducts any portion of their secretions to which 

 the tęst could be applied ; globules of oil alone offering themselves 

 to his observation, and these existed also in the spirit in which the 

 animais \vere preserved. 



