246 JoURNAL OF CoMPARATIVE NEUROLOGY. 
g. lat. ac.—ganglion of r. lateralis accessorius (portion of geniculate gan- 
glion). : 
g. dat. X.—ganglion of. r. lateralis vagi. 
Hf7M.—hyomandibular bone. 
ZT. s.—branch of third nerve for m. rectus superior. 
TTT. v.—ventral branch of third nerve. 
inf. med.—infero-medial strand (communis) of infra-orbital trunk. 
I. o. c.—infra-orbital canal. 
JV.—trochlearis nerve. 
jug. g-—jugular ganglion of the vagus. 
fat. X.—lateralis root of the vagus. 
7, 7X.—lateralis branch (r. supratemporalis) of the IX nerve. 
lob. inf.—lobi inferiores. 
lob. VII.—lobus facialis of oblongata. 
LOS. 1, LOS. 2.—accessory lateral line ossicles. 
m.—meningeal twig of r. lateralis accessorius. 
m. ad. arc. pal.—m. adductor arcus palatini. 
m. ad. t.—m. adductor tentaculi. 
m. a. m.—m. adductor mandibularis. 
m. 6.—origin of mental barblet. 
M. c.—main lateral line canal. 
m. a. o.—m. dilator operculi. 
m. !.—middle pit line. 
m.t. a. $.—m. levator arcus palatini. 
mot. V.—motor component of the trigeminus. 
mot. VIZ.—motor root of the facialis. 
muc.—mucous cells of the epidermis. 
mx. >—maxillary barblet. 
NVA.—nasal bone. 
. a/,—nerve of anterior pit line (continuing the supra-orbital canal). 
. 6.—origin of nasal barblet. 
mot, X.—motor nucleus of vagus. 
5-—nerve of fifth organ of supra-orbital canal. 
ob/.—medulla oblongata. 
of. 6.—olfactory bulb. 
op. lob.—optic lobe. 3 
op. n.—optic nerve. 
OSP.—orbito-sphenoid bone. 
0. 5. 5.—fifth organ of supra-orbital canal. 
owt. buc.—outer buccal branch of the facialis. 
o. V.—superficial origin of the trigeminus. 
o. V//.—superficial origin of the facialis. 
PFR.—post-frontal bone. 
pmé.—origin of post-mental barblet. 
p- #. a.—posterior nasal aperture. 
POP.—preoperculum. 
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