No. 2.] THE ADHESIVE ORGAN OF AMIA. 495 
creased weight of the larva due to yolk accumulation and 
have been consequently reduced. They are, in their turn, 
probably homologous with the anterior gut pouches of Amphi- 
OXUS. 
We have in the adhesive organ of Ganoids an indication 
that their eggs have at no time contained more food yolk 
than at present, while the existence of a reduced adhesive 
organ in Elasmobranchs indicates that the Ganoid and Elas- 
mobranch lines separated before the accumulation of yolk in 
the Elasmobranch ovum. 
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