A Monograph of the British Fossil Crustacea: Belonging to the Order Merostomata

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Palĉontographical Society, 1878 - Crustacea, Fossil - 263 pages
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Page 7 - Similarly, as to the organs of taste 1 ' Indeed, the only segment ' in the crustaceans ' that may be said to be persistent, is that which supports the mandibles, for the eyes may be wanting, and the antennae, though less liable to changes than the remaining appendages, are nevertheless subject to very extraordinary modifications, and have to perform functions equally various. Being essentially and typically organs of touch, hearing, and perhaps of smell, in the highest Decapods...
Page 8 - THIS is really a handy book. A concise account of all known minerals is given in alphabetical order, and references are added to the cases in -which specimens may be found in the British Museum and the Museum of Practical Geology.
Page 46 - On the discovery, by Mr. Robert Slimon, of fossils in the uppermost Silurian rocks near Lesmahago in Scotland, with observations on the' relations of the Palaeozoic strata in that part of Lanarkshire.
Page 94 - I will tell you,' he said, turning to the company—' I will tell you what these are—the remains of a huge lobster.' He arranged the specimens in the group before him with as much ease as I have seen a young girl arranging the pieces of ivory in an Indian puzzle. There is a homage due to supereminent genius, which Nature spontaneously pays when there are no low feelings of...
Page 225 - ... what are the Crustacea of today derived ? Are we to assume that they all descended from the phyllopods and ostracods — the only two remaining orders whose life-history is conterminous with that of the trilobita? Or are we to assume that the arachnida are the older class ?
Page 159 - Sailer's evidence is most valuable in confirmation of the identity of these remains ; for in the Survey Monograph he figures (p. 101) five of the anterior body-rings from Leintwardine, which agree closely in form with the specimen from Lanarkshire. He also observes (p. 99) that " the hinder segments were decidedly longer in proportion to their width than in Pterygotus Anglicus, or Pt. gigas.
Page 249 - M. de Koninck also thinks it probable that the body of Cyclus was soft and very contractile, that it was a parasite, and that the two tubercles which we have called the eyes really covered those organs — and, further, that the ribbed border protected the feet when the animal was in repose. We must differ from M. de Koninck in referring this form to the Trilobita. If truly an adult, it must be placed near to Apus with the other shieldbearing Phyllopoda ; if a larval form, it may have been the early...
Page 191 - ... (PI. 3, Fig. 12). The upper shell of the animal is composed of three parts — the forward shield, which is greatly the larger, the posterior shield, and the long bayonet-shaped spine, or tail. In the burrowing operation the forward edge of the anterior shield is pressed downward, and shoved forward, the two shields being inflected, and the sharp point of the tail presenting the fulcrum as it pierces the mud, while underneath the feet are incessantly active, scratching up and pushing out the...
Page 176 - The telson is 12 lines in length and 1J line in breadth where it articulates with the abdomen. It tapers gradually to a fine point. If we regard the first six body-rings from the head as thoracic, and the remaining three segments as abdominal, we must presume that each of these latter is a double segment, as compared with the segments of the Eurypterida proper.

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