THK CHONDKOCKANIUM IN PIIK K^HTIl VOFSIDA. 141 



Fis;. 10. Vfiitral view of same. 



Fig. 11. Median view of otic capsule of same. 



Fii;-. 12. Dorsal view of model from Amhlyittotaa punctata, sixty-nine 



mm. louK- 

 Fig. i;^. Ventral view of same. 

 Fig. 14. Dorsal view of model from Desiaognathus fimra. twenty 



mm. long. 

 Fig. 15. Dorsal view of model of nasal capsules from Plellnxlou 



glutinosum, twenty mm. long. 

 Fig. Kj. Dorsal view of model from yprturus maculatus, forty-live 



mm. long. 

 Fig. 17. Side view of model from young Amphinma nxenns. 

 Fig. 18. Dorsal view of same. 



Fig. 19. Ventral view of model from older Amphinma. 

 Fig. 20. Dorsal view of model from Pipa americana. 

 Fig. 21. Ventral view of nasal region of same. 

 Fig. 22. Dor.sal view of model from young Ichthijapldx gUttinosus. 

 Fig. 23. Ventral view of same. 



Fig. 24. Side view of model from older Irhthyophis glutiuosus. 

 Fig. 25. .Median view of otic region of same. 

 Fig. 2(;. Dorsal view of nasal capsules of same. 

 Fig. 27. Side view of model from young Poli/ptcrus bichir. 

 Fig. 28. Side view of model from trout twenty-two mm. long. 

 Fig. 29. Ventral view of same. 

 Fig. 30. Side view of model from young Protupltrus anntcttns. 



(See text, p. 130, for error in shape of Meckel's cartilage.) 

 Fig. 31. Dorsal view of same. 

 Fig. 32. Ventral view of same. 



