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ILLINOIS BIOLOGICAL MONOGRAPHS 



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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 cristalus 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 



ee columna ethmoidalis 



cr t crista trabeculae 



ct cornu trabeculae 



en external naris 



fen eth fenestra ethmoidalis 



fen ic fenestra infra-conchalis 



fo foramen olfactorius 



fan foramen orbito-nasalis 



