16. Median harelip with absence of intermaxillæ (_Bland Sutton_). 17. Median fissure of upper lip (_Bernard Pitts_). 18. Oblique facial cleft (_Tillmanns_, after _Kraske_). 19. Facial cleft in child (_Tillmanns_, after _Hasellmann_). 20. Double facial cleft with macrostoma (_Tillmanns_, after _Guersant_). 21. Puppy’s head with double alveolar harelip and double partial facial cleft (after _Albrecht_). 22. Lateral aspect of a severe case of macrostoma (_Bland Sutton_). 23. Double macrostoma with auricular appendages (_Tillmanns_). 24. Ditto ditto (_Fergusson_). 25. Mandibular cleft (_Wölfler_). 26. Intermaxillary sutures of a tetraprodontous child’s jaw (after _Albrecht_). 27. Intermaxillary sutures in a hexaprodontous jaw (after _Albrecht_). 28. Muscles of palate dissected (_Fergusson_). 29. Head of fœtus at 5 weeks (_Sutton_). 30. Head of fœtus at about 6-7 weeks (_Sutton_). 31A. Head of fœtus at about 8 weeks, from the front (_Quain’s Anatomy_). 31B. Head of fœtus seen from below (_Quain’s Anatomy_). 32, 33. Later stages of development of head (_Quain’s Anatomy_). 34. Diagram of development of palatal processes and ethmo-vomerine plate (after _Gegenbaur_). 35. Bony palate of a 6 months’ fœtus (after _Gilis_). 36. Diagram illustrating “Goethe” theory of alveolar harelip. 37. Diagram illustrating “Albrecht” theory of alveolar harelip in a tetraprodontous jaw. 38. Diagram illustrating “Albrecht” theory of alveolar harelip in a hexaprodontous jaw. 39. Adult upper jaw with right-sided alveolar harelip and cleft palate (after _Albrecht_). 40. Child’s jaw with cleft palate and double alveolar harelip, showing the sockets of the teeth (after _Albrecht_). 41. Os incisivum (_Fergusson_). 42, 43. Diagrams illustrating the effect of differing slopes of the palatal segments (_Mason_). 44. Teat of feeding bottles adapted for feeding infants with cleft palate (_Mason_). 45. Coles’s nipple shield for ditto (_Coles_). 46A and B. Author’s incisions for unilateral harelip, and position of sutures. 47A and B. Graefe’s operation for unilateral harelip. 48A and B. Nélaton’s ditto. 49A and B. Malgaigne’s ditto. 50A and B. Giraldés’ ditto, or the mortise operation. 51A and B. Mirault’s ditto. 52. Stokes’s ditto (_Mason_). 53A and B. Collis’s ditto (_Mason_). 54A and B. Author’s incisions for double harelip. 55. Sédillot’s operation for ditto (_Mason_). 56. T. Smith’s operation for ditto (_Mason_). 57. T. Smith’s gag with tongue plate (_Messrs. Arnold and Son_). 58. Mason’s gag (_Matthews Bros._). 59. Rose’s gag (_Matthews Bros._). 60. Various forms of raspatories (after _Durham_). 61A. Fine hook forceps.