278 ALUS. [Vol. XVIII. 



join that branch of the hyoideo-mandibularis faciahs that is sent to 

 innervate the adductor operculi and adductor hyomandibularis 

 muscles ; this arrangement thus being markedly different from 

 that found in Scomber, although it is said by Goronowitsch to 

 exist in Esox also. I also can not recognize in Scomber the N. 

 Weberi of Goronowitsch's description of Lota, a nerve that is cer- 

 tainly not the complete homologue of the Accessorius Weberi of 

 Haller's nomenclature. In Goronowitsch's Fig. 5 this nerve looks 

 strikingly like the communicating branch from the facialis to the 

 glossopharyngeus in Scomber, but its distribution, as shown in Fig. 

 I, precludes its being that nerve. Other dift'erences in the two 

 fishes are also to be noted. The ramus mandibularis facialis of 

 Lota is said to innervate a part of the adductor mandibulae muscle ; 

 which it certainly does not do in either Scomber or Ajiiia. The 

 levator arcus palatini of Lota is said to not be differentiated from 

 the adductor mandibulae. A nerve, called by Goronowitsch the 

 ramus buccalis facialis, is said to arise from the truncus hyoideo- 

 mandibularis, to be distributed to the skin near the articulation of 

 the lower jaw, and to be the homologue of one of the branches of 

 Trigeminus I. In Aniia the homologue of this nerve, if I am cor- 

 rect (No. 4), is distributed to the organs of the pit lines of the 

 cheek. The lateral canal organs of Lota are also not all inner- 

 vated as they are in Amia and Scomber, as has already been pre- 

 viously stated. 



The ramus posttrematicus glossopharyngei, runs downward, 

 from its ganglion, to the dorsal surface of the epibranchial 

 of the first arch, reaching that surface between the surface of 

 insertion of the ligamentous interarcualis dorsalis of the first 

 arch and that of the external levator of the same arch. In its 

 course it here lies dorsal to the suprapharyngobranchial of the 

 arch ; dorso-posterior to the common carotid artery ; dorso- 

 anterior and then ventro-anterior to the efferent artery of the 

 arch ; and ventral to the anterior prolongation of that artery. It 

 reaches the antero-lateral edge of the external surface of the first 

 arch, and in that position runs distally to the extreme distal end 

 of the arch, giving off numerous small branches and one large one. 

 Certain of the small branches are distributed to the degenerate 

 interbranchial muscle of the arch, and others to the degenerate 



