XIX 



Page 



27. Intestinal tract of Tachyhaptcs Jiuviatilis , 81 



28. Intestinal tract of Nestor notabilis 84- 



29. Dissection of a full-grown Axolotl {Amblystoma tiyrhmni), 



showing the skeleton and nerves of the head and three trunk- 

 segments 104 



30. Outline of spinal cord and hind brain, with roots of cranial 



nerves and first two spinal nerves, of a full-grown Axulotl . . 105 



31. 32. Partial reconstructions of the hind region of the skull and 



the anterior region of the trunk of an advanced larva of the 



Axolotl 105, 106 



33-35. Partial reconstructions of the left side of the head region of 



a young larva of the Axolotl 10(5, 107 



36. Reconstruction, seen from above, of the hind region of the skull, 



and anterior neural arches of a young larva of the Axolotl . . 107 



37. Left side view of a partial reconstruction of the anterior end of 



the trunk-region of a young larva of the Axolotl 108 



38. 39. Partial reconstructions, seen from the right side, of the 



anterior end of the trunk-region of a young larva of the 

 Axolotl 108 



40. Reconstruction, seen from above, of the head and anterior 



trunk-region of a young larva of the Axolotl 109 



41, 42. Reconstructions of the anterior trunk-region, seen from the 



right side, of a young larva of the Axolotl HO 



43. Left side view of a reconstruction of the anterior trunk-region 



of a young larva of the Axolotl Ill 



44. Right side view of a reconstruction of the anterior end of a 



larva of the Axolotl " Ill 



45. Partial reconstruction, seen from above, of the anterior region of 



an embryo of the Axolotl 112 



46. Similar reconstruction of the more dorsal region of the same 



Axolotl embryo 113 



47. Left side view of a reconstruction of the anterior region of an 



embryo Axolotl 113 



48. Partial reconstruction of the anterior region of an embryo 



Axolotl, seen from above 114 



49. Right side view of a reconstruction of an embryo Axolotl .... 115 



50. Diagrams of the segmentation of the metaotic region in 



Amphibia 116 



61. Diagram of the segmentation of the anterior region of an 



Amphibian 116 



62. Head of a Caribou [Rangifer tarandus caribou) with abnormal 



antlers 182 



53. The bladder, duct, and " red bodies " oi Anguilla vulgaris, viewed 



from the side 186 



54. External aspect of an Eel's rete mirabile 187 



55. The construction of an Eel's rete mirabile bipolare geminum . . 188 



