12, 13. Armour, supposed to be that of Megatherium.*
14—19. Armour of Dasypus and Chlamyphorus.
P late 6. V. I. p. 148.
1. Sections of Teeth of Megatherium, illustrating the
relative dispositions of the Ivory, Enamel,and Crusta
petrosa, or Ccementum. (Original. Clift.)
2. Posterior surface of a caudal vertebra of Megatherium,
exhibiting enormous transverse processes. On its
lower margin are seen the articulating surfaces
which received the chevron bone; the superior
spinous process is broken off. V. I. p. 151. (Sir
F. Chantrey. Original.)
P late 7. V. I. p. 168.
Ichthyosaurus platyodon from the Lias at Lyme Regis,
discovered by T. Hawkins, Esq. and deposited in the British
Museum, together with all the other splendid fossil remains
that are engraved in his memoirs of Ichthyosauri
and Plesiosauri. This animal, though by no means full
grown, must have measured twenty-four feet in length. The
extremity of the tail, and left fore paddle, and some lost
* Mr. Darwin has recently discovered the Remains of Megatherium
along an extent of nearly six hundred miles, in a North and
South line, in the great sandy plains of the Pampas of Buenos Ayres,
accompanied hy hones and Teeth of at least five other Quadrupeds.
He has also found that the Bones of this Animal are so often accompanied
hy those of the Mastodon angustidens, as to leave no donht
that these two extinct species were contemporary.
I learn from Professor Lichstenstein, that a fresh importation of
Bones of Megatherium, and hony armour has lately heen sent to
Berlin from Buenos Ayres, and that there remains no room to douht
that some portion of this armour appertained to the Megatherium.
It appears very prohahle, from more recent discoveries, that
several other large and small animals, armed with a similar coat of
mail, were co-inhahitants of the same sandy regions with the Megatherium.
fragments of the rest of the skeleton, are artificially restored.
(Hawkins.)
P late 8. V. I. p. 170.
1. Skeleton of a young Ichthyosaurus communis, in the
collection of the Geological Society of London, found
in the Lias at Lyme Regis. (Scharf. Original.)
2. Ichthyosaurus intermedius, from Lyme Regis, belonging
to Sir Astley Cooper. (Scharf. Original.)
P late 9. V. I. p. 170.
1 and 2. Ichthyosaurus tenuirostris, from the Lias near
Glastonbury, in the collection of the Rev. D. Wil-’
liams, of Bleadon, near Bristol. The position of the
ribs is distorted by pressure. (Scharf. Original.)
3. View of the right side of the head of the same animal.
(Original.)
P late 10. V. I. pp. 171, 173.
1. Head of Ichthyosaurus platyodon, in the British
Museum, from the Lias at Lyme Regis, copied from
Sir E. Home’s figure in the Phil. Trans. 1814.
2. Copied from Mr. Conybeare’s figure, (in the Geol.
Trans. Lond. O. S. PI. XL. Fig 11.) shewing the
analogies between the bones of the head of Ichthyosaurus,
and those which Cuvier has marked by corresponding
letters in his figure of the head of the
Crocodile.
3. Two of the bony plates in the sclerotic coat of the
Eye of Ichthyosaurus platyodon.
4. Circle of bony plates in the Eye of the snowy Owl.
(Yarrel.)
5. Circle of similar plates in the Eye of the golden Eagle.
(Yarrel.)