Annals of the New York Academy of Sciences, Volume 4 (Google eBook)

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New York Academy of Sciences, 1889 - Science
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Page 49 - ... suspended in the air were small luminous sparks as though from a rocket. I had not recovered from my surprise when I saw this luminous air disappear and there remained on the ground only such a light as is made when a match is rubbed. A number of people from the...
Page 131 - I much suspect, that a predisposition to vitriolization, in these pyrites, is produced by a small portion of oxygen being previously combined with a part, or with the general mass, of the sulphur, at the time of the original formation of these substances, so that the state of the sulphur is tending to that of oxide, and thus the accession of a farther addition of oxygen becomes facilitated.
Page 94 - ... at their extremities. Pygidium a little more than one-fourth wider than long, rather distinctly convex, rounded behind and more or less straight in front, with anterior lateral angles obliquely truncated and a little rounded. Mesial lobe very prominent and well defined, rounded above, and...
Page 95 - Entire outline elliptical, the breadth being to the length as 75 to 130 Cephalic shield forming more than a semi-circle, round in front and nearly. straight behind; posterior lateral angles terminating in short, abruptly pointed spines extending back to the anterior edge of the thoracic segment. Glabella rather depressed, convex, wide anteriorly and narrowing posteriorly to the neck furrow, just in front of which, and connected with the...
Page 114 - ... saw-fish, or Pristis family. He stated that the sword of the Pristis is originally composed of two bones, and if these should continue separated, each part, with teeth on only one side, would not be much unlike the fossil specimen. This is curved, however, and the teeth have fine serratures. He supposed that the fish had a corresponding jaw projecting from the opposite side of its head, and that both formed a powerful weapon of offence. He regarded it not only as an undescribed genus, but belonging...
Page 75 - ... the width, widest behind, three furrows on either side, posterior pair strongly marked: these commence at the dorsal sinus, about one-third the distance from base to front, pass in a curve backwards, and bifurcate about midway between the center and sides of the glabella; one branch, very shallow, is continued for a short distance almost transversely; the other bends backwards nearly to the occipital sinus, and with the main branch partially encloses a large oval lobe on each side, the lobes...
Page 92 - The side lobes have 10 or 12 depressed convex ribs, the last three indistinct, the first 3 or 4 with a very obscure, fine groove near the posterior edge, in the outer third of the length. The smooth border is about onefourth the width of the side lobes at the anterior angles, but a little wider behind; all the space behind the apex of the axis is smooth. Each rib has...
Page 117 - The rounded roughened base proves that this organ could not have been articulated with any bones and scarcely with cartilages ; else we should have some evidences of coadaptation. In this respect it resembles most the dorsal spines of sharks and skates, which are implanted in the...
Page 12 - ... longer than head ; caudal rounded, longer than head, but shorter than ventral, lateral line ceasing before reaching end of dorsal, the scales below regularly arranged, those above nearly so. Color in life, yellowish brown on sides, each scale with a darker or orange spot; back shaded with violet, which grows brighter and merges into intense sky blue along the edges of spinous dorsal and on the region before the dorsal; scales of dorsal region with brown spots like those on sides; head paler;...
Page 100 - ... as well as around the cheeks to near the front of the glabella ; posterior margins of the cheeks, behind the continuations of the neck furrow, very prominent, or forming a thickened rim. Facial sutures extending obliquely forward and outward from the anterior side of the eyes, and again curving inwards, so as to cut the anterior margin nearly on a line with the anterior inner extremity of the eyes ; from the posterior end of the eyes, directed obliquely outwards and backwards, so as to intersect...

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