76 ILLINOIS BIOLOGICAL MONOGRAPHS 
EXPLANATION OF PLATE 
Fig. 15.—Dorsal view of model of nasal capsule of an adult Diemictylus viridescens. 
Fig. 16—Dorsal view of model of nasal capsule of Triton cristatus 28 mm. long. 
Fig. 17.—Dorsal view of model of nasal capsule of Triton cristatus 35 mm. long. 
Fig. 18.—Dorsal view of model of nasal capsule of Spelerpes bilineatus 15 mm. long. 
Fig. 19.—Dorsal view of model of nasal capsule of Spelerpes bilineatus 37 mm. long. 
Fig. 20.—Dorsal view of model of nasal capsule of Spelerpes bilineatus 46 mm. long. 
c cupola ins internasal space 
ee columna ethmoidalis lm lamina medialis 
ort crista trabeculae pa _ processus antorbitalis 
ct cornu trabeculae pb _ planum basale 
cn external naris pe pons ethmoidalis 
fen eth fenestra ethmoidalis pnp prenasal process 
fen ic fenestra infra-conchalis pt planum tectale 
fo foramen olfactorius t trabecula 
fon foramen orbito-nasalis 
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