Section

Acanthopyge, a trilobite the size of a crab. 21. Thysanopeltis, a relative of Scutellum. 23. Griffithides, from Carboniferous rocks of Indiana. 23. Cnemidopyge, a close relative of Ampyx. 26. Three blind trilobites, Conocoryphe. 27. A strawberry-headed trilobite of the Silurian period, Balizoma variolaris. 28. Pagetia, a diminutive, flea-sized trilobite. 29. Selenopeltis, with enormously elongated genal spines. 30. Moulted, cast-off exoskeleton of Leonaspis. 31. Sao hirsuta from the...

Shells

Opipeuter Trilobite

Lhwyd wrote to his correspondent Martin Lister about the fossils to be found in the limestones around the South Wales town of Llandeilo the 15th of August whereof we found great plenty must doubtless be referred to the scele-ton of some Fiat-Fish. Lhwyd's flatfish were, of course, trilobites. When my children were young they used to play a game with sea shells. Holding a large whelk to one ear they contrived to hear the sea the distant crashing of waves on the shore, or the...

Illustrations

Drawing of the giant trilobite Paradoxides by Philip Lake. 23 The anatomy of a trilobite. 31 Spines recovered from trilobites from the Ordovician of Virginia by Professor Whittington. 40 Flatfish figured in Philosophical Transactions of the Royal Society by Dr. Lhwyd 1679 . 48 Fantasy trilobite from J. S. Shroeter 1774 . 54 Charles Doolittle Walcott. 59 Walcott's first attempt to show the limbs of the trilobite Modern reconstruction of the branched limb of Triarthrus. 62 Professor Beecher's...