443 
nerve enters the dorsal nasal cavity while two are distributed to the 
ventral. Within the conical boney projection, these three branches 
are enclosed in a single sheath, to shortly separate into two large 
nerves that cross dorsal to the eye muscle and pass ventral to the 
floor of the skull where each becomes a part of the trigeminal nerve. 
Soon after entering the orbital region, each nerve gives off a branch 
to a mass of muscles which are probably the levator palpebrae. These 
facts identify this nerve as the ophthalmic branch of the fifth nerve 
with only one branch given off before it enters the naso-frontal pro- 
cess. The terminal branches in the proboscis are probably the regular 
nasal nerves. 
The two cavities in the proboscis, separated by cartilage resting 
on a boney floor, and innervated by the ophthalmic nerve strongly 
supports WıLpeEr’s hypothesis that 
this is a normal organ that has been 
prevented from growing normally be- 
cause of the median eye. 
Theeyemuscles. The superior 
oblique, external, superior and inferior 
recti muscles are easily identified. 
Beneath the stiperior recti are two 
bands of muscles that are evidently 
the internal rect) muscles. The in- 
ferior oblique is fused into a single 
muscle, Fig. 4, with no evidence of a 
central trend as in WiLpDER’s terata 
XII (Fig 82b and plate IV, Figs.9 ygFi 4, Yona son of gre 
—10). The trochlear is very delicate fifth nerve. O. J. Inferior oblique 
and could not be traced. A distinct muscles. R.I. Inferior recti muscles. 
2 ITT. Branches of Ocular-motor nerves. 
fine nerve ended in each external rectus. 
The ocular motor nerve passes out through the skull with the trigemi- 
nal. Each ocular motor nerve gives off a branch to the superior recti 
muscles, then the two shortly join, separate and join again, finally 
ending in the single inferior oblique. Fig. 4. On each side the oph- 
thalmic branch is caught in a loop formed by the branch passing to the 
superior rectus and inferior oblique. The remaining distribution of 
the fourth nerve is normal. 
Beside the regular eye muscles, there are a half dozen small, 
distinct strands of muscle that extend in the same direction as the 




