KiNGSLEY, Nervous Anatoiny of Amphibians. 55 



Still further in front von Plessen and Rabinowicz describe 

 a nerve uniting the maxillaris with the palatine. As such a 

 ramus communicans occurs in no other Urodele which I have 



Figure i. Lateral reconstruction of the proximal portions of the fifth and 

 seventh nerves of a Salamandra maculata embryo, body length 26 mm. ag, 

 accessory ganglion of VII ; gj, ganglion of facialis ; gg, Gasserian ganglion ; 

 wa', ramus mandibularis ; wx, ramus maxillaris; <?/, ophthalmicus profundus; 

 ^j-, ophthalmicus superficialis ; ros, root of the ophthalmicus profundus; r^ , 

 root of the trigeminal; r vii , root of the facialis; *, ramus communicans be- 

 tween the mandibularis and maxillaris nerves, x 30. 



Studied, this condition was also investigated. In all other Uro- 

 deles the connection occurs between the opthalmicus profundus 

 (the nasalis of von Plessen and Rabinowicz) and the palatine, a 

 condition which is not found in their figures or description. In 

 this I think they have made a mistake and that a part of their 

 error has arisen in this manner. In Salamandra, near the an- 

 terior limit of the eye the maxillaris nerve comes to lie close 

 against the inferior oblique muscle at its insertion on the ball 

 while the middle branch (their b) of the ophthalmicus pro- 

 fundus lies against the same muscle near its origin. It there- 

 fore appears possible that they have mistaken the muscle for a 

 part of the ramus communicans, a mistake the more readily 

 made since in many forms there is such connection between the 

 maxillaris and the palatine. The true relationship may be seen 

 from fig. 2, which shows the middle division of the ophthal- 

 micus profundus connected with the palatine by a short 

 transverse commissure, just as is the case in Amblystoma, 

 (my studies confirming the results of Herrick in this respect) 

 and in Amphiuma and other forms. In Salamandra maculata, 

 in front of this ramus communicans, the middle branch of the 

 opthalmicus profundus suddenly bends downwards and goes to 



