1 62 STRONG. [Vol. X. 



microscopical examination of serial sections, probably, can 

 determine such a point. 



It is evident from the above that Osborn was mistaken in 

 his conjecture that the lower of the two most dorsal Facialis 

 bundles, i.e.j "VII/," is motor. Judging from Amblystoma 

 also, there seems to be no functional difference between the 

 distributions of the two divisions of the dorsal VII. Biirckhardt 

 (12), probably following Osborn, seems to have fallen into the 

 same error of supposing this ventral division to be motor. 



The postauditory part of the lateral line component, going 

 into the IX + X and emerging as the Rr. laterales is represented 

 by Osborn's most anterior (cephalic) root of the IX (IX i). 

 Its similar origin to VII u and / is brought out in his paper. 

 Urodela resemble the tadpole in having several Rr. laterales 

 (Fischer, Ecker). In fishes subdivisions take place further 

 caudad. 



A paper by von Plessen and Rabinovicz (48) on the cranial 

 nerves in larvae of Salamandra maculata demands some notice, 

 especially as it seems to require correction in several points 

 which are liable to lead to confusion. The authors distinguish 

 two ganglia belonging to the Trigeminus, a '* principal gan- 

 glion " and, above it, an '* accessory ganglion," connected with 

 the Facialis root by their ** Radix dorsalis." From the principal 

 ganglion are derived two main branches, (I) the R. mandibularis 

 and (II) the R. nasalis. (I) divides into {a) R. communicans 

 cum supramaxillaris, {b) R. supramaxillaris inf., {c) motor twig 

 to the M. pterygo-temporalis, {d) motor twig to the masseter, 

 {e) cutaneous twig to jaw angle, and (/) R. mentalis. (II) 

 divides into {a) twig to rectus superior (.'*), (b) nasal branch, 

 if) R. palatinus, {d) cutaneous branch to snout. From the 

 accessory ganglion arise (I) R. communicans c. n. faciali (from 

 the Radix dorsalis) (II) R. frontalis, cutaneous and supraorbital, 

 (III) R. supramax. sup., infraorbital and cutaneous, and giving 

 off a communicating branch to the R. palatinus facialis. 



Continuing, they describe the Facialis as arising with the 

 Acusticus. While traversing the auditory capsule it gives off 

 (I) the R. palatinus. After separating from the Acusticus it 

 divides into (II) the R. buccalis and (III) R. hyoideo-mandi- 



