589 



posterior carotid before that branch falls into the transverse commis- 

 sure, or how, is not wholly clear, but it is evident that Hoffmann 

 has considered a part of the internal carotid of my descriptions (his 

 posterior carotid) as a part of the anterior carotid (efferent pseudo- 

 branchial) artery (his anterior carotid), and this seems to me an 

 error. Furthermore, it seems quite probable that the efferent pseudo- 

 branchial artery of his descriptions is always separated from the 

 cranial cavity proper by the lining membrane of that cavity, as in 

 Eaja, and as Hoffmann himself so finds the canaHs transversus in 

 Pristiophorus (1. c. p. 297). 



Palais de Carnoles, Menton, May 28th 1912. 



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