A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) ... / With 7 plates and 96 textfigures.
- British Museum (Natural History). Department of Geology
- Date:
- 1911
Licence: In copyright
Credit: A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) ... / With 7 plates and 96 textfigures. Source: Wellcome Collection.
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![Gallery VII. Table case I. Table-case 1. obscure the water ami protect the animal in its flight from an enemy. A [)aint made from this ink is called sepia, after the Latin nanie of the cnttle-ii.sh. The ink-hag is often found in these fos.sils, and its contents can still he used as a ])aint. llehind the hody-chamher are seen the phragmocone and the guard, and stretching along the .sides of the whole shell are expansions of the mantle, forming fins. Belemnites Fig. 84.—Restoration of the animal and shell of belemnites. a, back view ; h, front or under view. (After d’Orbigny.) having this general structure and a solid guard lived to the close of the Cretaceous Epoch, when they disappeared. AVhereas the Ammonites left no descendants, the helemuites appear to have become changed into other forms. One of these, Beloscjna, is found in the Eocene London Clay (Fig. 85 d). Here the guard has become reduced in size, and the se])ta stretch in an upward curve from the apex of the shell (corresponding to the helemnite jdiragmocone) to the front of the pro-ostracum. They are numerous and close together. This form leads to the ordinary Sepia or cuttle- fish, of which two glass models are shown. The .shell of this](https://iiif.wellcomecollection.org/image/b24863841_0182.jp2/full/800%2C/0/default.jpg)
