Memoir, العدد 10University of the State of New York, 1907 |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
Acanthodian AGNATHA Arthrodires Asterolepis belonging bones Bothriolepis C. R. Eastman Campbellton cartilage Cedar Valley limestone Cephalaspis Chemung Chemung beds Chemung group Cladodus Cladoselache Clarke Claypole Cleveland shale Coccosteus Comparative Zoology cranial Crossopterygii Ctenacanthus Ctenodipterines Delaware limestones dental plates denticles dentition dermal detached Dinichthys Dipnoans Dipterus dorsal fin external fauna fin spines Formation and locality fossil genera genus Hamilton limestone head shield Holoptychius J. S. Newberry Jour known lateral limestone lower dental plates Lower Devonic Machaeracanthus Macropetalichthys mandibles mandibular margin median occipital Mesodevonic Middle Devonic Milwaukee Monogr Museum of Comparative Mylostoma N. Y. Original Natural Neoceratodus Ohio ornamentation paired fins Paleozoic pectoral pectoral fins pineal Portage portion posterior preserved Pterichthys Ptyctodus Rep't Rhynchodus ridges sandstone sensory canals Siluric species surface symphysial Teleostomi text fig text figure Titanichthys Traquair tritoral tubercles U. S. Geol Upper Devonic ventral vertebrates Whiteaves York State Museum
مقاطع مشهورة
الصفحة 4 - Secretary to the Commissioner HARLAN H. HORNER BA Director of State Library EDWIN H. ANDERSON MA Director of Science and State Museum JOHN M. CLARKE Ph.D. LL.D. Chiefs of Divisions Accounts, WILLIAM MASON Attendance, JAMES D. SULLIVAN Educational Extension, WILLIAM R. EASTMAN MAMLS Examinations, CHARLES F.
الصفحة 4 - Brooklyn 1908 DANIEL BEACH Ph.D. LL.D. - Watkins 1914 PLINY T. SEXTON LL.B. LL.D. - .- -Palmyra 1912 T. GUILFORD SMITH MACE LL.D. - - Buffalo 1918 WILLIAM NOTTINGHAM MA Ph.D.
الصفحة 4 - Ph.DLHD LL.DDCL - New York 1915 ALBERT VANDER VEER MDMA Ph.D. LL.D. - Albany 1911 EDWARD LAUTERBACH MA LL.D. - ... New York 1909 EUGENE A. PHILBIN LL.B. LL.D. - ... New York 1916 LUCIAN L. SHEDDEN LL.B.
الصفحة 39 - Figs. 1 and 2, represented by the double dotted lines) passes from the dorso-lateral plate of the body on to the external occipital, where it at once bifurcates, a transverse branch passing across over the posterior part of the median occipital to join its fellow of the opposite side. The main groove then runs forward on the lateral cranial plate, and, arriving in front of the median opening, it bends inwards to join the opposite groove on the premedian plate, on which it forms a small backward flexure....
الصفحة 69 - The total length of the dental plates rarely exceeds 5 cm. and there is close similarity between those of the upper and lower jaws, excepting that the symphysial margin of the lower is produced into a long and slender descending spine, and the cutting edge of the upper is somewhat less arched or "excavated" than in the lower dental plates.
الصفحة 46 - The pattern of the cephalic sensory canal system is considerably different from that in Asterolepis and Pterichthys. No transverse commissure unites the lateral canal of each side across the occipital plates; but in front, just at its incurved flexure on the lateral plate, a conspicuous branch is given off, which runs forwards and outwards to the margin of the shield, being very likely continuous with that on the maxillary plates on the lower side of the head shield. On the median occipital two fainter...
الصفحة 62 - The type of this species is a small, imperfectly preserved tooth found by Mr. Charles E. Monroe in the Hamilton limestone of Milwaukee, Wis. The median cone is robust, very thick at the base, and indistinctly striated. The external denticles are also stout in proportion to the size of the principal cone, but the three intermediate denticles of either side are excessively small. The total hight of the median cone probably amounted to less than 1.5 cm, and the width across the base 2.5 cm.
الصفحة 80 - Newberry, 1889. Locality : Some fragmentary specimens from the Milwaukee cement quarry, Humboldt street bridge, Milwaukee have been referred to this species. Genus Phlyctaenacanthus Eastman. Description : "Arcuate spines of large size, with flat lateral surfaces, very broad at the base and gradually tapering to an acute point. Ornamentation and other characters as in Acantholepis, except that the exserted portion is certainly unsegmented. Inserted portion triangularly expanded, thin walled and hollow,...
الصفحة 44 - PI. II., Fig. 6) has its lateral margins more perpendicular to the posterior one, the anterior margin shows not merely a shallow reentering angle for the postmedian plate, but a deep semielliptical notch or excavation. The postmedian is small, narrow, semi-elliptical in shape, and, except its anterior margin, is entirely received in the aforesaid notch of the median occipital, not extending on each side to join the laterals, as in Pterichthys and Asterolepis. The laterals (/.) are much broader, while...
الصفحة 138 - Dinichthys intermediits, but only half to two-thirds as large, and the mandible bears two subordinate prominences back of the turned up toothlike extremity; also the posterior end of the cutting edge is set with two or three unequal denticles in place of the series of even, lancet-like points in the same position on the mandible of D.