262 ALUS. [Vol. XVIIl. 



den." We thus have, according to Goronowitsch, the posterior 

 division of the palatinus faciaUs of the cartilaginous ganoids, asso- 

 ciated, in Lota, with the maxillaris inferior trigemini. 



It should here be noted that the ramus mandibularis internus 

 trigemini of my descriptions must not be confounded with the 

 nerves similarly named by Wright, Pollard and Goronowitsch, for 

 my mandibularis internus is probably a branch of \yhat all those 

 authors call the ramus mandibularis externus trigemini, externus 

 and internus being apparently used by them to express simply the 

 relations of the nerves to the coronoid process of Meckel's carti- 

 lage. I overlooked this use of the name by Wright and Pollard 

 when I gave the name I did to the branch in Ainia, and Gorono- 

 witsch's work had not }'et appeared when my manuscript was sent 

 to press. Stannius simply refers to what is probably the mandibu- 

 laris externus of these authors, a nerve that must accordingly con- 

 tain my mandibularis internus, as an outer "Unterkieferast" (No. 

 70, p. 45). The remaining portion of the maxillaris inferior is 

 considered by him, as by me, as the continuation of the trunk of 

 the nerve itself, and it is said by Stannius to separate into an upper 

 and a lower portion, "welche beide zunachst fiir die Innenflache 

 des Unterkiefers bestimmt sind." These two portions of the nerve 

 have, however, in my opinion, little if any anything to do with 

 the innervation of the lining membrane of the mouth cavity, and 

 hence are not internal mandibular nerves in the sense in which I 

 have used that term, based on the application of the same term 

 to the ramus mandibularis facialis. 



The next two branches of the maxillaris inferior of Scomber, 

 after the fourth branch, are given off close together, soon after 

 the main nerve has entered the mandible, one arising from the 

 antero-dorsal edge of the nerve and the other from its postero- 

 ventral edge. Both run forward, the dorsal one of the two enter- 

 ing the dentary near its dorsal edge and running forward, in a 

 canal in the bone, nearly to its anterior end. It lies, in this part of 

 its course, immediately ventral to the small sharp teeth that line 

 the edge of the mandible. 



The next branch of the nerve is given off as the main nerve 

 reaches the dorsal surface of Meckel's cartilage. It runs down- 

 ward alonsf the external surface of that cartilagfc. and at its ven- 



