NOTES ON PROF. JUDSON HERRICK'S PAPER ON 

 THE CRANIAL NERVES OF THE COD FISH. 



By F. J. Cole, 



University College, Liverpool. 



I am indebted to the courtesy of Professor Judson Herrick 

 for the opportunity of examining his work on the Cranial 

 Nerves of the Cod Fish before it was sent to the printer, and 

 willingly respond to his considerate invitation for some remarks 

 on those parts of the work that concern myself Before doing 

 so, however, I must say that, whilst it is very gratifying that he 

 should confirm my work as far as regards the lateral line sys- 

 tem, which was the principal object of my paper, it is only 

 doing his work an obvious justice to admit that, by the exami- 

 nation of much older fish by " Markscheidenfarbung, " he has 

 made considerable advances as regards two subsidiary but im- 

 portant questions on which I had hoped to have thrown some 

 light. I now beg to add the following notes to his paper : 



1. The little twig (Fig. i, r. o. p. I.) is «<?/ represented in 

 my sections. It must be remembered that the correspondence 

 between the pit-organs of G. morfJma and G. virens is general, 

 but by no means exact, i. e., applies to areas and not to Indi- 

 vidual sense organs, and the organs innervated by this twig in 

 G. morrhtia may be absent in G. virens. Greater variations 

 than this occur in the lateral line systems of the two species. 

 Note further the absence of the barbule in G. virens. 



2. Prof. Herrick appears to cast doubt on my statement 

 that the IXth nerve contributes to the lateralis accessorius. 

 However inexplicable this statement may be, there can be no 

 doubt as to its foundation in fact. The connection was not 

 always found, but it ivas found in some cases on removing the 

 roots of the IXth and Xth to a dish, and dissecting them care. 



