. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. expanded anteriorly, no lateral fur- rows, eyea large and close, j)08terior; facial sutures commencing at tlie ante- rior apex of the sliield, curving lat- erally, and til en con- tracting to the eyes in front and making a sig- moidal flexure, cut the posterior mar- gin midway between the dorsal furrows and the genal spines; pygidium sub- triangular, outer margin bordered, and terminating in a spine. Type M. limba
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. expanded anteriorly, no lateral fur- rows, eyea large and close, j)08terior; facial sutures commencing at tlie ante- rior apex of the sliield, curving lat- erally, and til en con- tracting to the eyes in front and making a sig- moidal flexure, cut the posterior mar- gin midway between the dorsal furrows and the genal spines; pygidium sub- triangular, outer margin bordered, and terminating in a spine. Type M. limbata. belemnura, White, 1874, Eep. Invert. Fobs., p. 11, and Geo. Sur. W, lOOtu Mer., vol. 4, p. 69, Quebec Gr. or Up. Taconic. Fig. 1080.—MeKulnspIs num. Pygldtuii belem-. FiQ. 1031.—Mesonncts vermontaiio. Menocephalus, Owen, 1852, Geo. Sur. Wis., Iowa, and Minn., p. 577. [Ety. vienos, strength; kephale, head.] Cephalic shield semicircular, with a narrow bor- der all around; glabella highly con- vex, hemispherical or ovate, with a broadly rounded front, sometimes show- ing two inconspicuous lateral furrows Fi(}. '. Meiiorcpliiilus saltcil. on each side; cheeks tumid; ''vch dig. tant from the middle oi the ^ bclja; facial suture cuts the front n rf^in ^ little inside a line drawn lengtln. "{• of the body and through the eye, aud > nts the posterior margin a little outside this line; thoracic segments f:ix or seven, axis convex, tapering a little nairower than the side lobes ; i)yj.'i(liuni semicirculiir,axis and side lobes divided by segmental, furrows. Type M. min- nesotensis. ?globosn8, Billings, 1860, Can. Nat. and Geo., vol. 5, p. .301, and Pal. Fosh., vol. 1, p. 408, Quebec Gr. or Up. Taconic. minncsoteusis, Owen, 1852, Geo. Sur. Wis., Iowa, and Minn., p. 577, Potsdam Gr. (?) salteri, Devine, 1863, Can. Nat. and Geo., vol. 8, p. 210, and Pal. Foss., vol. 1, p. 203, Up. Ta- conic. ?8edgwicki, Billings, 1860, Can. Nat. and Geo., vol. 5, p. 301, and Pal.
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
