x LIST OF ILL USTRA TIONS. 



FIG. PAGE 



21. BRAIN OF HATTERIA ... ... ... ...43 



22. A SECTION OF THE PINEAL EYE OF HATTERIA... 44 



23. OVIDUCT IN A MALE SKATE ... ... .-47 



24. THE EMBRYONIC ALIMENTARY CANAL ... 49 



25. DIAGRAM OF THE ALIMENTARY CANAL AND NERVOUS 



SYSTEM ... ... ... ... ... 50 



26. AN AFRICAN CHILD WITH A TUMOUR ... 53 



27. A FAUN ... ... ... ... ... 54 



28. AN jEGIPAN AND FAUN ... ... ... 55 



29. OVERGROWN NAIL IN A SLOTH ... ... ... 57 



30. HEAD OF A PARROT WITH OVERGROWN BEAK... 58 



31. A HORNED SHEEP WITH CERVICAL AURICLES ... 63 



32. THE CLOACA OF A HEN ... ... ... 64 



33. VERMIFORM APPENDIX OF A GIBBON ... ... 66 



34. FOLLICULAR CYST IN A PORCUPINE ... ... 72 



35- AN ODONTOME IN A HORSE ... ... ... 73 



36. AN ELASMOBRANCH FISH WITH ITS YOLK-SAC ... 76 



37. DIAGRAM OF THE ALIMENTARY CANAL AND YOLK-SAC 77 



38. AN EARLY HUMAN EMBRYO ... ... 8 1 



39. DIAGRAM INDICATING SITUATIONS OF BRANCHIAL 



SLITS... ... ... ... ... 82 



40. GIRL WITH CERVICAL AURICLES... ... ... 83 



41. A CHILD WITH CERVICAL AURICLES ... ... 83 



42. A COMMON GOAT WITH CERVICAL AURICLES ... 84 



43. AN EGYPTIAN GOAT WITH CERVICAL AURICLES... 85 



44. MICROSCOPIC STRUCTURE OF A CERVICAL AURICLE 86 



45. SECTION OF CERVICAL AURICLE FROM A GOAT... 87 



46. HEAD OF A SEAL ... ... ... ... 89 



47. HEAD OF AN .EGIPAN WITH CERVICAL AURICLE 90 



48. FAUN AND GOAT FROM THE CAPITOL ... ... 9! 



49. CONCRETION FROM THE GUTTURAL POUCHES OF A 



HORSE ... ... ... ... ... 95 



