Transactions of the American Philosophical SocietyAmerican Philosophical Society, 1902 Held at Philadelphia for promoting useful knowledge. |
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anaphase apposed arch articular face bivalent chromatin nucleolus bivalent chromosomes bone C.Mf canine Catalogue centrum chromatin elements chromatin nucleoli chromo chromosomal number Clepsydrops convex Cope Deuterosaurus Dimetrodon distal end dorsal dumbbell-shaped edge equations foramen fossils genera genus germinal cycle growth period Hemiptera humerus incisor inner intercentrum July lateral view Latitude A Ther Length lower maturation division maturation mitosis maxillary Metazoa Micrometer molars monaster stage N.Mf nearly neural spines nucleus number of chromosomes observations Observatory orbit Oreodon outer Pair P Micrometer paternal Pelycosauria Permian pole view posterior premolars probably prophases quadratojugal reduction division rest stage ridge Right Ascension separated skull spermatid spermatocytes spermatogenesis spermatogonia spermatogonic monaster spindle squamosal Star surface synapsis stage teeth tooth transverse true nucleolus uneven number univ univalent upper vertebræ view of monaster Width
Popular passages
Page 19 - 4. The separate articulation of the anterior part of the astragalus with the tibia is as in the same order. " 5. The presence of a facet for an articulation of a spur is as in the same order.
Page 19 - Reptilia. (2) The relations of the astragalus and calcaneum to each other are as in the Monotreme Platypus anatinus. (3) The articulation of the fibula with both calcaneum and astragalus is as in the Monotreme order of mammals. (4) The separate articulation of the anterior part of the astragalus with the tibia is as in the same order.
Page 9 - Height of crown of compressed tooth 8* Transverse diameter 4' " This reptile was about six feet in length, and carnivorous in habit. Its remains are from the same locality in New Mexico that yielded those of Nothodon" This is probably one of the Clepsydropidœ.
Page 19 - The following results may be derived from the preceding statements : (1) The relations and number of the bones of the posterior foot are those of the Mammalia much more than those of the Reptilia. (2) The relations of the astragalus and calcaneum to each other are as in the Monotreme Platypus anatinus. (3) The articulation of the fibula with both calcaneum and astragalus is as in the Monotreme order of mammals.
Page 8 - In each separate premaxillary there are two slender pointed teeth. In front of the maxillary there are one or two similar teeth, followed by a number with narrow transverse crowns, resembling in form the premolars of some carnivorous mammals. These crowns, when unworn, have a central cusp, and on each side a tubercle, somewhat like that on the premolars of the genus Canis. In the present species the first and last of the transverse teeth are smaller than the middle ones. The limbs were short, the...
Page 285 - Catalogue of 6415 Stars for the epoch 1870, deduced from Observations made at the Glasgow University Observatory during the years 1860 to 1881, preceded by a Synopsis of the Annual Results of each Star arranged in the order of Right Ascension.
Page 282 - Jerome de Lalande, for which tables of reduction to the epoch 1800 have been published by Prnf.
Page 11 - Compare these statements with those found in my paper read before the National Academy (which had been previously read before the American Philos. Society, April 5th) and published May 8th. That Prof. Marsh profited by what he heard, is evidenced by his use of the term " intercentra," first introduced by myself. From this point of view it is easy to understand his attempt to make it appear that Meyer first used the word. He says, "Another character of much interest is the presence of certain hypaxial...
Page 20 - The ribs of the Theromorpha are two-headed. While the tubercular articulation has the usual position at the extremity of the diapophysis, the capitular is not distinctly, or is but partially indicated, on the anterior edge of the centrum, in Clepsydrops and Dimetrodon. In Embolophorus, as I showed in 1869, the capitular articulation is distinctly to the intercent.rum.
Page 14 - The distal side of the astragalus presents two faces, one of which receives a large part of the proximal extremity of the cuboid. The structure of the scapular and pelvic arches was stated to be identical with that already described by Owen as belonging to the Anomodontia. Several important characters distinguish this group from the Pelycosaitfta, but the two together form an order which Prof.