xvi LIST OF ILLUSTRATIONS. 



FIGURE PAGE 



37. Astacus pallipes : Dissection of a male from the right side . 156 



38. Periplaneta americana : The head, front view . . .171 



39. The head, from behind 171 



40. Dissection of a male from the right side . 176 



41. Dissection of the hinder part of the abdomen 



of a female ...... 185 



42. Amphioxus lanceolalus : A young specimen, seen from the 



right side ...... 188 



43. Transverse section through the anterior part of 



the pharynx 209 



44. , Transverse section through the hinder part of 



the pharynx ...... 213 



45. Transverse section passing through the atrial 



pore ....... 215 



46. Transverse section passing through the anus . 216 



47. Scyllium canicula : The skull and visceral skeleton from the 



right side 226 



48. The skull and visceral skeleton from the ventral 



surface .232 



49. The pelvic girdle and finsfrom the ventral surface 237 



50. The pectoral girdle and fins from the ventral 



surface ....... 239 



51. Longitudinal vertical section through the head 



and anterior part of the body . . . 246 



52. The venous system ..... 248 



53. Scyllium catulus : The arterial system .... 254 



54. Scyllium canicula : Transverse section passing through the 



posterior dorsal fin . . . . . 259 

 55-56. Dissections of the renal and reproductive 



systems of the female .... 265 

 57-58. Dissection of the rena and reproductive 



systems of the male ..... 268 



59. Scyllium catulus : Dissection of the brain and cranial nerves . 272 



60. Lepu8 cuniculus : Selected vertebrae ..... 295 



61. The skull from the right side . . .303 

 61a. Canis familiaris : Skull in longitudinal section . . 305 

 61b. ,, Ventral surface of the skull . . . 308 



62. Lepus cuniculus : Skeleton of the left hand. . . . 328 



63. Skeleton of the left foot . . . .328 



64. Dissection of a male from the left side . . 340 



65. Dissection of the neck ..... 374 



66. Diagrammatic transverse section through the 



head, showing the tympanio cavity and 



auditory ossicles . . ... . 382 



67. Dissection of the brain from the right side . 386 



68. Ventral surface of the brain .... 389 



69. Dissection of the brain from above . . 393 



70. Transverse section of the brain, passing through 



the third ventricle ..... 396 



71. Median section of the brain .... 398 



72. Transverse section of the brain, passing through 



the cerebellum ...... 400 



