Page:On Some Reptilian Remains.pdf/1

 alone, as we have seen, will suffice. Besides, heat entering ice could not produce a mechanical pressure that would move the glacier for heat produces contraction of volume, not expansion. True, heat no doubt destroys the crystalline structure of the ice-molecule by tearing the constituent particles separate; but nevertheless the volume of the mass is diminished by this process, for ice in losing its crystalline structure, or, in other words, in passing from ice to water, decreases in volume.

4. On some Reptilian remains; by Prof., (Proc. Am. Phil. Soc., xi, 117.)—The fossil which Prof. Cope exhibited was the almost perfect of a  , the . He explained various of its structure, as the  of certain of the  pieces on each other, the suspension of the  at the extremity of a cylinder composed of the, &c., and other peculiarities. He also explained, from specimens, the characters of a large new , discovered by Wm. E. Webb, of, which possessed deeply , and  , with the  directed after the manner usual among vertebrates. The former was thus shown to belong to the true, and not to the , of which was the. Several caudals were anchylosed, without, and of  form, while proximal caudals had anchylosed  and distinct chevron bones. The form was regarded as new, and called , from the great relative stoutness of the paddle.

He also gave an account of the discovery, by Dr. Samuel Lockwood, of, of a fragment of a large , in the which underlies immediately the clay  below the lower Green Sand bed in  The piece was the extremities of the  and , with - anchylosed to the former, in length about sixteen inches; distal width fourteen. The of the first series of  with each other, and with the tibia, he regarded as a most interesting peculiarity, and one only met with elsewhere in the reptile  and in birds. He therefore referred the animal to the order, near to Compsognathus Wagn. The extremity of the fibula was free from, and received into, a cavity of the astragalo-calcaneum, and demonstrates what the speaker had already asserted, that the fibula of and  had been inverted by their describers. The cavity was filled with open. The species, which was one half larger than the type specimen of ', he named '.

5. Sulphur Deposits of the island of Saba in the Dutch West Indies, (from a Report on the Deposit, by .—The Island of Saba belongs to the volcanic range of the Carribee or Windward Islands.

A few miles to the south and west of Saba there is an extensive coral reef, upon which soundings vary from 7 to 140 fathoms in depth; between this reef and the island there is practically no bot-