279 



have ruptured it. The coeHac artery [C) was likewise normal in its 

 origin but it extended backwards to as far as the coelomic orifice of the 

 sac, when it turned round the rim of this, and divided into three 



N/i 



Slaowing the everted proximal limb of the stomach of an abnormal dogfish [ScylUuin 

 canicitla.]. The floor of the pharynx (PH) has been cut away and the ventral wall of 

 the" sac [S'] has also been removed. The dorsal aorta [A] has been represented as re- 

 moved towards the animal's left, for the sake of cleai'ness. 



