Herrick, Nerves of Silurotd Fishes. 199 
Plate XXI of my Gadus paper (’00). In Ameiurus the three 
components are so intimately united in this nerve that even 
small terminal branchlets often contain all of them, as shown 
by the fact their fibers may supply the skin in general, terminal 
buds and pit organs. — 
The r. maxillaris runs parallel with the r. mandibularis 
until that nerve under the eye turns laterally toward the man- 
dible. In this region it divides into two unequal branches, the 
larger becoming lateral, the smaller mesial. The latter runs 
forward between the palate bone and the m. adductor tentaculi 
and its tendon and then divides into four branches of which 
three enter the maxillary barblet along with the twig from the 
r. mandibularis, already described, while the fourth distributes 
to the skin of the upper lip just cephalad of the insertion of 
this barblet. The mesial branch runs over the palatal bone and 
under the nasal sac, closely accompanied by the terminal twig 
of the r. buccalis for the premaxillary pit line across the tip of 
the snout, and distributes to the lateral premaxillary teeth and 
the skin and taste buds of the lateral parts of the upper lip, as 
described by WriGHr., . 
JUGE ('99, p. 73) finds in Silurus a branch of the r. max- 
illaris which temporarily fuses with the r. ophthalmicus super- 
ficialis V (his oph. profundus) and separates to supply the alve- 
olar region of the pre-maxillary bone. A twig from this nerve 
anastomoses with the r. palatinus VII. It is instructive to 
compare this anastomosis with similar ones between the ophthal- 
micus, profundus and the palatine in the Amphibia (cf. Coe- 
HILL, ’O1). 
15. Ramus buccaks. 
This third member of the infra-orbital complex is, as usual 
among the teleosts, quite intimately joined with the r. maxil- 
laris, from which, however, WriGHT was able to separate it 
peripherally as well as centrally. But his statement (94a, p. 
367) that ‘‘it contains fibers other than those derived from the 
tuberculum acusticum” does not apply to the species of Ameiu- 
rus which we are now considering, for at no point in its course 
