Proceedings of the Royal Physical Society of Edinburgh, 2. kötet

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35. oldal - ... branches, the whole adhering closely to the glass. After a day or two's growth in this manner, a perpendicular stem begins to shoot from some point of this creeping root, and soon separates into four straight, slender, slightly divergent * Communicated to the Royal Physical Society, 24th November 1858. tentacles, which shoot to a considerable length. The little creature is now a polyp of four tentacles." At this stage they all died, and he never succeeded in repeating his observations. In August...
239. oldal - ... equally dispersed throughout its whole substance ; but, on the contrary, separate parts have their appropriate forms ; and thus we find that there are often three, four, or even more forms of spicula in the same individual. The author therefore, in describing them, proposes to treat of these organs in the following order : — 1 . Spicula of the skeleton. 2. Connecting spicula. 3. Defensive spicula. 4. Spicula of the membranes. 5. Spicula of the sarcode. 6. Spicula of the gemmules.
305. oldal - Nobody, however, who has paid any attention to the peculiar features of our present era, will doubt for a moment that we are living at a period of most wonderful transition, which tends rapidly to accomplish that great end, to which, indeed, all history points — the realisation of the unity of mankind.
348. oldal - Taf.) *Second Report of a Geological Reconnoissance of the Middle and Southern Counties of Arkansas. Made during the years 1859 and 1860. By David Dale Owen, Principal Geologist, assisted by Robert Peter , Chemical Assistant ; M. Leo Lesquereux, Botanist; Edward Cox, Assistant Geologist.
193. oldal - Thaumantias, off Granton Pier. To the peduncle of one of these was attached a small actinia, about half an inch in length, and one-eighth of an inch in diameter. From its general appearance, he considered it to be a young specimen of Actinia troglodytes, which had been seized by the medusa, dragged from its native mud, and brought captive to the surface of the water ; but it was unfortunately lost before he could examine it carefully. In June, his friend, Mr Fulton of Granton Pier, brought him a...
269. oldal - A Notice of the Origin, Progress, and Present Condition of the Academy of Natural Sciences of Philadelphia " (1852) ; and " Notes and Commentaries during Voyages to Brazil and China, 1848
327. oldal - The following donations to the library were laid on the table, and thanks voted to their respective donors:—' The Transactions of the China Branch of the Royal Asiatic Society
317. oldal - I have elsewhere recorded the successive changes which occur in the Medusoids of several species of Atractylis. It is also certain that such increase in the number of elements does occur in JEquoria vitrina, for the smaller specimens have always a less number than the larger. Meantime, the question as to the larval state of JEquoria vitrina is settled. This, the largest of all the naked-eyed Medusas, is the reproductive phase of one of the smallest of all the Hydroidae.
398. oldal - It has since been secured for the national collection, the British Museum. Mr Greg tells us the proportion of meteoric stone to iron-falls may be taken at 25 to 1, — ie, 96 per cent, of all that fall consist of stony matter; and in his Mineralogy he gives a list of nineteen or twenty meteoric stones, the fall of which has been recorded, as occurring in Great Britain and Ireland. The instance above referred to is, however...

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