Anterior nostril in a thin moderately long
membranous tube, somewhat higher posteriorly, in
front of upper edge of pupil; posterior nostril
posterodorsal to anterior nostril, its ovate opening
nearly twice as large as anterior nostril, separated
from edge of orbit by a distance only slightly greater
than nostril diameter; internarial space containing a
large pore. Pores of lateralis system on head prominent,
especially the five of mandibular series and the
suborbital series.