186 JOURNAL OF COMPARATIVE NEUROLOGY. 
JuGE (‘99) in his recent monograph on the nerves and muscles 
of Silurus are more difficult of correlation. His work was done 
by dissection and maceration in 10% nitric acid, without mi- 
croscopic control, a method obviously inadequate to unravel 
completely so intricate a ganglionic plexus. But he labored 
under the further disadvantage of following in his morphological 
interpretations the erronious scheme of GoronowiTscH. Ihave 
previously commented at length (99, p. 290-291, 366-399) 
upon the defects in this author’s tri-metameric analysis of the 
trigemino-ficial complex of the fishes in which he finds three 
segmental nerves, each with dorsal sensory and ventral motor 
root, in this complex. His first unit is the first root of SrTan- 
Nius, as I have enumerated them above, the second unit is the 
dorsal and ventral lateralis roots, the latter erroniously regarded 
as motor, and the third unit is the communis and motor facialis 
roots. Now JuGE not only fails to recognize the impossibility 
of this scheme, but apparently wrongly identifies some of 
Goronowi!tscu’s roots in Silurus. Pending a microscopic ex- 
amination of this complex in Silurus, it will hardly be profitable 
to review all of JuGre’s conclusions, though it is obvious that 
Silurus is much more like Ameiurus than his descriptions would 
imply. For instance, in his analysis on p. 67, his ‘‘deuxiéme 
portion” (line 2) is evidently the infero-medial strand of WRIGHT 
and hence composed of communis fibers, while the ‘‘troisiéme 
portion” is the supero-lateral strand of general cutaneous 
fibers. It follows, then, that the ‘‘deuxiéme portion” cannot 
be, as he states in the next paragraph, the sameas the Trigem- 
inus I of GoronowitTscH, for the latter is derived from the 
trigeminus or general cutaneous root. 
We now pass to the detailed description of such of the 
branches of the cranial nerves of Ameiurus as are germain to 
the present point of view. The motor rami will not be fully 
described as I have merely confirmed the description of earlier 
students of the siluroid fishes in most of these cases. The in- 
nervation of the pharyngo-clavicularis, trapezius and a few 
other muscles, regarding which authorities differ, will be con- 
sidered more at length, however. 
