Proceedings of the Academy of Natural Sciences of PhiladelphiaAcademy of Natural Sciences of Philadelphia, 1862 "Publications of the Academy of Natural Sciences of Philadelphia": v. 53, 1901, p. 788-794. |
Otras ediciones - Ver todo
Términos y frases comunes
Acad Academy acutis algæ anal fin angle antennæ anticè aperture apice Aspergillum band basal base beaks bill Birds Amer Bleeker body whorl bones border brown brownish caudal fin caudal peduncle characters color compressed Conch convex Cretaceous Cuvier d'Orb dentibus Deshayes distinct dorsal fin dusky E. R. Showalter elongated elytris feathers Fishes foliis fossil genera genus Gill Gray Günther head inch intus Isaac Lea labials lævi lateral line lateralibus lateribus length linarius margin middle moderate narrow nearly oblique Operculum pectoral pectoral fins pieces plates Polynemus posterior posteriorly postice preoperculum present Proc punctatis radial rays River rounded rows Sandpiper scales shell side Sillago slender slightly snout species specimens spines spots striæ subfamily Supramaxillary surface suture Synonymy tail tarsus teeth THEODORE GILL thorace transverse Tringa upper valdè valve wings Zool
Pasajes populares
Página 315 - Shell transversely oval, or subtrigonal, moderately convex, rather thin: anterior side narrowly rounded; base forming a regular semielliptical curve; posterior side slightly truncated at the immediate extremity, abruptly rounded or subangular at its connection with the base below; dorsal outline sloping from the beaks in front and behind, at an angle of...
Página 237 - The most successful method of obtaining them Is to take such a position as they will probably fly over in passing from one feeding ground to another. They may then be shot with ease, as they rarely fly high at such times. The pertinacity with which they cling to certain feeding grounds, even when much molested, I saw strikingly illustrated on one occasion. The tide was rising and about to flood a muddy flat of perhaps an acre in extent, where their favorite snails were in great quantities. Although...
Página 427 - Pierre group, and also differs in presenting a more yellowish or ferruginous tinge. Towards the base it consists of sandy clays, but as we ascend to the higher beds we find the arenaceous matter increasing, so that at some places the whole passes into a sandstone. It is not separated by any strongly defined line of demarcation from the...
Página 268 - ... inches in length, measured from the tip of the lower jaw to the end of the longest lobe of the tail...
Página 526 - Description of new species of Cretaceous fossils from New Jersey, Alabama, and Mississippi: Acad.
Página 526 - Monograph of the Fossil Polyzoa of the Secondary and Tertiary Formations of North America. Wm. M. Gabb and GH Horn, MD . Art. lV. Descriptions of New Birds from Western Africa, in the Museum of the Academy of Natural Sciences of Philadelphia.
Página 434 - ... particular types of plants in the Cretaceous System of this country, than in that of the Old World. As the WIND RIVER DEPOSITS have not yet been seen in contact with any well marked beds of the other Tertiary formations of this region, and few fossils have yet been found in them, their position in the series remains doubtful. It is therefore only provisionally that we have placed this formation between the Fort Union and White River Groups in the foregoing section. It may possibly belong to the...
Página 81 - Catalogue of Fish collected and described by LT Gronow, now in the British Museum, p.
Página 427 - Pierre Group, as we have defined it, in the formation above. All the facts, however, so far as our present information goes. — taking into consideration the change in the sediments at or near where we have placed the line between these two rocks, — seem to mark this as about the horizon where we find evidences of the greatest break in the continuity of physical condiiions.
Página 403 - Shell transversely oval, nearly equilateral, light in texture for its size; posterior margin somewhat more pointed; anterior rounded, base slightly curved; valves convex; beaks full, raised above the outline of the shell; posterior portion a little longer; sulcations coarse, regular; epidermis dark chestnut brown; interior light blue...