INTEODUCTION.
Range of the Species.
1. Toclms melanoleucus. Angola; Ovampoland; river Shir6 to south of the equator.
2. Tockus fasciatun. Angola.
3. Tockiis seinifasciutus. Senegambia; Fantee.
4. Tockus Jlavi/rostris. IDamaraland ; Abyssinia.
5. Tonkus hempricliii. Abyssinia.
0, Tockits monteiri. Damaraliind.
7. Tockus gingalensis. Ceylon.
8. Tockus erythrorhyndms. Damaraland; Okovango river; Lake Ngami.
9. Tockus deokeni. Voi-Pluss; Taita, East Africa.
10. Tockus griseus. Malabar.
11. Tockus hartlauhi. Gold Coast.
12. Tockiis oamurus. Gold Coast to Gaboon.
LIST OF PLATES.
1. Bacorvus abvssinicus .
2. Bucorvus pyrrhops . .
3. Bucor-ras cafer . . ,
Buceros rhinoccros . .
5. Buceros sylvestris . .
C. Diclioecros bicornis
7- Ilydrocoras planieornis
S. Ilyclrocorax mindanensis
9. Hydrocorax semigaleatus
10. Bhinoplas vigil . . .
11. Antliraeoceros eoronatus
12. Anthracoceros convcxus
13. Aiitliracoecros malabaricus
14. AntTiracoeeros fratereulus
15. Anthracoceros malayanus
10. Cranorrliinus eassidis .
17. Oranorrhinus corriigatus
18. Cranorrbinus waldeni .
19. Cranorrliinus leueocepha]
20. Penelopides manillai .
21. Penelopides panini . .
22. Penelopides affinis . .
23. Ceratogymna data . .
2dj. Spbagolobus atratus .
25. Limonopbalus montani
26. Bycanistes erisfcatus .
27. Bycanistes buccinator .
28. Bycanistes subquadratus
29. Bycanistes subcylindrieas
30. Bycanistes cylindricus. .
Plate I.
I I .
I I I .
IV.
V.
YI.
VII.
VIII.
IX.
X.
XI.
XII.
XIII.
XIV.
XV.
XVI.
XVII.
XVIII.
XIX.
XX.
XXI.
XXII.
XXIII.
XXIV.
XXV.
XXVI.
XXVII.
XXVIII.
XXIX.
XXX.
31. Bycanistcs albotibialis .
32. Pbolidophalus flstulator
33. Pbolidophalus sbarpii .
3 4 Pbolidophalus casuarinus
35. Bhytidoceros undulatus
36. llhytidoceros subruflcolli
37. Kbytidoccros plicatus .
38. Rbytidoceros narcondaim
39. Anorrhinus comatus
40. Anorrhinus albocristatu:
41. Anorrhinus leueolophus
42. Anorrhinus galeritus
43. Anorrhinus tickelli .
44. Anorrhinus austeni .
45. Aceros nepalensis
40. Ilydroeissa esarrhata
47. Lophoceros nasutus.
48. Lophoceros birostris
49. Tockus mclanolcueus
50. Tockus fasciatus . .
51. Tockus semifasciatus
52. Tockus flavirostris
53. Tockus hempricbii
54. Tockus monteiri .
55. Tockus grisens .
50. Tockus gingalensis
57. Tockus erythrorhynchn
58. Tockus deckeni .
59. Tockus hartlaubi.
60. Tockus oamurus .
Plate XXXI.
XXXII.
XXXIII.
XXXI v.
XXXV.
XXXVI.
XXXVII.
XXXVIII.
XXXIX.
XL.
XLI.
XLIl.
XLIII.
XLIV.
XLV.
XLVL
XLVII.
XLVHL
XLIX.
L.
LI.
LII.
LIU.
LIV.
LV.
LVI.
LVII.
LVIII.
LIX.