NATURAL HISTORY. 
183 
GALLERY.] 
In and on the Wall Cases of Room IV. are placed the larger speci¬ 
mens of the various species of Ichthyosaurus, or the fish-lizard, so de¬ 
nominated on account of their having in a recent state clearly presented 
the external appearance of certain orders of fishes combined with the 
internal organization belonging to the Saurian reptiles. The most 
striking specimens are the I. Platyodon in the central Case, and various 
bones of its gigantic variety on the top of the same Case and in Case 2, 
such as the head cut transversely to show the internal structure of the 
jaws and the carpal bones of one of the extremities, &c., all from the 
lias of Lyme Regis;—a new small species I. latifrons , in which the 
spiracle on the top of the head, between the eyes, claims particular no¬ 
tice, from Balderton in the county of Nottingham ;—the splendid spe¬ 
cimens of P. intermedius , P. lonchiodon , P. communis , all from Lyme 
Regis; the P. longipinnis and P. longirostris from Whitby, &c. 
In the central passage between the Table Cases of these Rooms are 
placed various objects illustrative of particular mineral substances. One 
of the most interesting is a Table, presented by H. G. the Duke of 
Rutland, the slab of which is composed of a stalagmitical calcareous de¬ 
position, which was found investing the interior of a square w r ooden pipe 
in Blythe Lead Mine, Derbyshire. 
The sculptured tortoise near the centre of the Gallery, placed on a 
round table inlaid with various antique marbles and other mineral sub¬ 
stances, is wrought out of nephrite or jade. It was found on the banks 
of the Jumna, near the city of Allahabad, in Hindostan, brought to 
England by Lieutenant-General Kyd, and presented to the Museum 
by Thomas Wilkinson, Esq. 
ALPHABETICAL LIST 
OF THE 
MINERALS IN THE NORTH GALLERY, 
WITH REFERENCES TO THE TABLE CASES. 
Abrazite, 29. 
Aeanticone, 35. 
Achmite, 34. 
Acid, arsenious, 53. 
--boracic, 41. 
■-molybdic, 40. 
--silicic, 20, 24. 
-sulphuric, 55. 
Actinolite, 33. 
Adularia, 29. 
JEschynite, 39. 
Agalmatolite, 32. 
Agates, 23. 
Agate-jasper, 24. 
Alabaster, 46. 57. 
Alalite, 34. 
Albine, 27. 
Albite, 30. 
Allanite, 37. 
Allochroite, 36. 
Allophane, 26. 
Almandine, 36. 
Alum, 57. 
Alumina, 19. 
-fluoride, 59. 
-mellate, 60. 
-phosphate, 54. 
-silicate, 26. 
—— sulphate, 57. 
Aluminite, 57. 
Alum-stone, 57. 
Amalgam, native, 2. 
Amazon-stone, 29. 
Amber, 60. 
Amblygonite, 54. 
Amethyst, 20. 
-oriental, 19. 
Amianth, 34. 
Ammonium chlo¬ 
ride, 59. 
Amphibole, 33. 
Amphigene, 30. 
Analcime, 27. 
Anatase, 39. 
Andalusite, 31. 
Anglesite, 57* 
Anhydrite, 56. 
Anorthite, 30. 
Anthophyllite, 33. 
Anthracite, 4. 
Anthraconite, 46. 
Antimoniates, 40. 
Antimony, grey, 10. 
—— native, 3. 
— ochre, 40. 
—— oxysulphuret, 
40. 
--plumose, 10. 
-red, 40. 
-sulphuret, 10. 
-- white, 40. 
Apatite, 53. 
Aphrite, 45. 
Apophyllite, 27. 
Arendalite, 35. 
Arfvedsonite, 33. 
Arragonite, 42. 
Arsenic, native, 4. 
■—- with cobalt, 4. 
•— oxide, 53. 
-sulphurets, 11. 
Arsenic bloom, 52. 
Arsenious acid, 53. 
Arseniurets, 4. 
Asbest, 34. 
Asparagus-stone, 53. 
Asphalt, 60. 
Atacamite, 59. 
Avanturino-quartz, 
22 . 
-feldspar, 29. 
Augite, 34. 
Automolite, 19. 
Axinite, 38. 
Azurite, 37* 54. 
Babingtonite, 34, 
Baikalite, 34. 
Bardiglio, 56. 
