502 Edward Ph«lps AUis jr., The Latero-Sensory Canals and Belated Bones in Fishes. 



Fig. 22. Dorsal view of tlie skull of Esox hicius. showing also the infraorbital 



and preoperculo-mandibnlar canal bones as in Fig. 7. x ^j... 

 Fig. 23, The same view of the skull of Salmo namaycush.- x '/.,. 

 Fig. 24, Lateral view of the head of Salmo namaycush ; showing de latero-sensory 



pores and the head lines of pit organs, x 1. 

 Fig. 25. Dorsal view of the same, x 1. 

 Fig. 26. Ventral view of the same, x 1. 

 Fig. 27. Dorsal view of the skull of Coregonus clupeiformis, showing also the 



infraorbital and preoperculo-mandibular canal bones as in P'ig. 7. x ^/3. 

 Fig. 28. The same view of the skull of Alosa sapidissima, l)ut without the nasal 



bone. X '^/o. 

 Fig. 29. Lateral view of the head of Gymnarchus niloticns, sliowing the latero- 

 sensory canals and the manner of innervation of the enclosed sense 



organs, x P'.i- 

 Fig. 30. Dorsal view of the skull of Hippoglossus vulgaris, x -/o. 

 Fig. 31. Dorsal view of the sknll of Perca fluviatilis, showing also the infraorbital 



and preoperculo-mandibular canal bones as in Fig. 7. x Vj.,. 

 Fig. 32. The same view of the skull of Micropterus dolomieu. x P/g. 

 Fig. 33. The same view of the skull of Pomatomus saltatrix. x '^/.;. 

 Fig. 34. The same view of the skull of Archosargus probatocephalus. x -/3. 

 Fig. 35. The same view of the skull of Cottns octodecimospinosus. x "^/3. 

 Fig 36. Front view of the end of the snout of Acipenser sturio, showing the 



latero-sensory canals, x 6. 

 Fig. 87. Lateral view of the head of Acipenser sturio, with the skin removed so 



as to show the dermal bones and the latero-sensory canals, x ^/j. 

 Fig. 38. Dorsal view of the same; showing the canals on the right side and the 



surface pores and nerve-sacs on the left side, x ^j^. 

 Fig. 39. Ventral view of the same, x ^/.,. 



Fig. 40. Lateral view of the head of Scaphirhynchus platyrhynchirs. x 1. 

 Fig. 41. Dorsal view of the same, x 1. 

 Fig. 42. Ventral view of the same, x 1. 

 Fig. 43. Lateral view of the same with the skin removed so as lo show the 



dermal bones and the latero-sensory canals, x 1. 

 Fig. 44. Dorsal view of the same, x 1. 

 Fig. 45. Ventral view of the same, x 1. 



