76 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[76 



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 Spderpes Ulineatus 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 Mlineatus 46 mm. long. 



c cupola 



ee columna ethmoidalis 



Cf t crista trabeculae 



ct cornu trabeculae 



en external naris 



fen eth f enestra ethmoidalis 



fen ic f enestra infra -conchalL, 



fo foramen olf actorius 



fan foramen orbito-nasalis 



ins internasal space 



Iw lamina medialis 



pa processus antorbitalis 



pb planum basale 



pe pons ethmoidalis 



pnp prenasal process 



pt planum tectale 



t trabecula 



