XIV LIST OF ILLUSTRATIONS. 



FIG. PAGE 



49. A diagrammatic representation of the general cutaneous com- 



ponents of a trunk segment , 106 



50. A simple diagram of the general cutaneous components in the 



cranial and spinal nerves of a fish 107 



51. A reconstruction of the cranial nerves of Petromyzon dorsatus 



to show the arrangement and distribution of the several sys- 

 tems of nerve components 108 



52. The principal sensory collaterals in the spinal cord of the 



new-born rat. From Cajal 109 



53. Some cells of the dorsal horn in the chick embryo of five 



days. From Cajal in 



54. Transverse section of the substance of Rolando of the cervical 



cord in the new-born cat. From Cajal 112 



55. Cells in the dorsal horn of the cord in a chick embryo of 



nineteen days incubation. From Cajal 113 



56. Transverse section through the spinal V tract and the sub- 



stance of Rolando in a new-born rabbit. From Cajal . . 114 



57. A, transverse section of the spinal cord of Lampetra to show 



the ceils of the dorsal horn 115 



58. A, transverse section of the tuberculum acusticum of Lam- 



petra; B, a sagittal section of the cerebellum of the same 

 animal 116 



59. A diagram representing the centers and fiber tracts related to 



the general cutaneous components in fishes 118 



60. A diagram representing the general cutaneous centers and 



fiber tracts in the human brain 120 



61. A large and a small neuromast from a sucker embryo at about 



the time of hatching 124 



62. A diagram of the lateral line canals and nerves in Amia. 



After E. Phelps Allis 125 



63. A reconstruction of the chief rami of the cranial nerves in a 



bony fish, Menidia, to show the arrangement of the several 

 systems of components. After C. Judson Herrick . . . . 129 



64. Transverse section of the brain of the sturgeon at the level of 



the VII and VIII nerves 131 



65. Transverse section of the brain of the sturgeon at the level of 



the V nerve ' 132 



66. Transverse section of the brain of Scy Ilium to show the fold- 



ing of the cerebellar crest and tuberculum acusticum . . . 133 



