198 



the "lateral line" branches of the IXth and Xth, in order to ascertain 

 whether they do not belong (with perhaps the exception of some few 

 fibres) to the lateralis accessorius system. Miss Alcock's figures 

 strongly suggest that they do. That this alternative should be taken 

 into consideration is obvious enough, since if it obtains Ammocoetes 

 will fall into line, re its cranial nerves, with other Fishes. 



On p. 149 I find the following statement: 



"It is clear from the above description that the sense organs of 

 the lateral line system are innervated by the facial, the glossopharyn- 

 geal, and the vagus, and not by the trigeminal, which is in harmony 

 with all the more recent researches on this subject. I may therefore 

 add one more class of animals to the list given by Cole to which this 

 statement applies: 



1) Cyclostomata (present communication). 



2) Holocephali (Cole). 



3) Elasmobranchii (Ewart). 



4) Teleostei (Pollard — Siluroids, e. g. CI arias and Auchen- 

 aspis). 



5) Ganoidei (Allis). 



6) Dipnoi (Pinkus). 



7) Amphibia (Strong)." 



This is a perversion (although I have no doubt unintentional) of 

 what I actually said, since I expressly excluded the IXth nerve from 

 taking any part in the innervation of lateral sense organs. The latter 

 was not described either by Ewart, Pinkus, Strong or myself, although 

 Ewart and the present writer published a description of such a case 

 in L a e m a r g u s. Miss Alcock then goes on to remark : 



"That the glossopharyngeal innervates a portion of the lateral line 

 system has been shown in Holocephali, in Elasmobranchii, in Teleostei, 

 and in Ganoidei; yet Cole treats this fact as an exception, which may 

 be explained away by future researches." Here Miss Alcock is re- 

 ferring to a passage in my Chimaera paper in which after drawing 

 attention to the fact that the lateral line nerves had one by one been 

 disassociated from the remaining cranial nerves, I ventured to indulge 

 in a little prophecy, and predicted that the so-called lateral line branch 

 of the IXth would be found on proper investigation to come from a 

 true lateral line nerve. Perhaps Miss Alcock will allow me to draw 

 her attention to the following facts, established since the public- 

 ation of my paper: 



1) In Amia, as Miss Alcock herself points out, Allis has de- 

 scribed a branch of the IXth supplying sense organs of the lateral line, 



