468 Edward Phelps AUis jr., 



probable that this nerve is identical with the R. dorsalis recurrens 

 trigemini (Stannius), which is said to innervate a line of end buds 

 a.t the base of the dorsal fin in Silnroids, but the dorsal body line 

 of organs in Batrachus would hardly seem homologous with this line 

 of end buds". That the organs innervated by this nerve, whether 

 they be innervated by communis or by latero-sensory fibres, can be the 

 homologues of the organs of the lateral line of Amia, seems to me, 

 from the course alone of the nerve, most improbable; and I should 

 look for the latter organs in those organs of the middle side line 

 that are innervated by the nervus lineae lateralis. 



In Lophius, the latero-sensory organs are said to all lie in grooves 

 or pits, none of them being enclosed in canals. Guitel's description 

 of this fish I have not been able to procure, and have had to content 

 myself with Herrick's [46, p. 38] quite extensive references to it. 

 According to this latter author the buccal part of the main infra- 

 orbital line is represented by a line of organs that corresponds to the 

 anterior commissure and the maxillary line together of Clapp's 

 descriptions of Batrachus, and to those two lines only. That part of 

 the infraorbital line that would correspond to the third group of 

 buccal organs of Amia is said to have wholly disappeared, and the 

 otic group of organs is said to probably be represented in certain 

 of the posterior organs of G-uitel's supraorbital line "oe". This latter 

 suggestion seems to me a most improbable one, and, moreover, the caudal 

 part of the same line, "oc", is said by Herrick to probably represent 

 the anterior head line of pit organs of other fishes. The otic organs, 

 if here represented, would then be intercalated between the posterior, 

 and certain more anterior organs of a confinons supraorbital line. It 

 is much more probable that, if the third group of buccal organs has 

 wholly disappeared, the otic organs have disappeared with them; but 

 I do not consider it in any way improbable that these two groups of 

 organs may be represented either in a part of the socalled maxillary 

 line, or by surface organs, similar to those in Batrachus, which may 

 have been overlooked by Guitel. 



A line of oi'gans that would represent, in my nomenclature, a 

 part of the hoiizontal part of the main infraorbital line, begins 



