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angle aperture appear arranged Barrande base bicornis bifurcating branches branchlets broken bryonoides caduceus Callograptus cell cell-apertures cell-denticles cell-divisions cell-partitions celluliferous side central axis central disc centre character common body corneous Dendrograptus denticles diameters Dictyonema Diplograptus diverging divisions elongate enlargement from fig Explanations of Figures EXPLANATIONS OF PLATE extended filiform flattened folia Formation and Locality.—Quebec Formation and Locality.—Shales fossils four stipes fragment frond funicle Geinitz genera genus Geological Survey graptolites Hall Hisinger Hudson River hundredths inch initial point iron pyrites length Locality.—Quebec group Logani longitudinal margin mode of growth narrow numerous obliquely Phyllograptus Plate XVII Point LeVis portion preserving pustules Quebec group rachis radicle range of cellules Report for 1857 Retiograptus Retiolites Sagittarius Salter series of cellules serratures sextans shale shown Silurian simple stipes slate slender solid axis sometimes space species species of graptolites striated substance surface Survey of Canada transverse undulating upper Utica vertically width zoophytes
Page i - Report of Progress of the Geological Survey of Canada for 1874-75." Dr. Ells, also, in the "Report of Progress...
Page 141 - P.odies consisting of straight or flexuous stipes (simple or conjoined at base?) with alternating and widely diverging branches; branches long, simple or ramose, in the same manner as the stipe. Substance fibrous or striate; the main stipe nnd branches marked by a longitudinal central depressed line, indicating the axis. Cellules or serratures unknown.
Page 126 - ... Dendrograptus as characterized by "a broad spreading shrub-like frond" and by cellules, that appear "sometimes as simple indentations on the surface and sometimes distinctly angular, with the denticles conspicuous"; adding that "in some specimens the cellules are indicated by prominent postule-like elevations, arranged along the centre or in subalternate order on one face of the branch.
Page 79 - ... (sicula) short, obtusely pointed. The stipe is from four to ten hundredths of an inch (.4 mm-2.5 mm) in width. "Cellules narrow and very little expanded towards the aperture, about twenty in the space of an inch (8 in 10 mm), slightly curving upwards, and inclined to the axis at an angle of about 30°; from three and a half to four times as long as broad. Cell-apertures slightly curved, nearly vertical towards the posterior side and arching towards the anterior side. The apex of the denticle,...
Page 133 - Flabellate fronds, with numerous slender bifurcating branches proceeding from a strong stem or axis. Branches and divisions celluliferous on one side, the opposite side striate ; sometimes distantly and irregularly united by transverse dissepiments.
Page 127 - An enlargement of one of the branchlets, showing the cellules. c. The main stipe and some of the principal branches, natural size. There is a swelling or protuberance at the base or radicle, one side of which is broken off FOSSILS 2. 1. Lingula
Page 139 - Branches and branchleis plumose, the pinnules rising alternately on opposite sides of the branches: celluliferous on one fuce only: branches cylindrical or flattened. Substance corneous, dense; apparently smooth exteriorly, or corrugated by compression or during fossilization.
Page 50 - Hydrozoa, the fact of the young being similar in form to the adult ia remarkable, since probably all the modern forms undergo a marked metamorphosis prior to reaching the mature form. The following synopsis of genera is that proposed by Professor Hall:- I. Species consisting of stipes, or fronds, with a bilateral arrangement of the parts ; a solid axis, with a common canal extending along each series of cellules.
Page 19 - In the Graptolites with four stipes the condition appears like that of two individuals of tvvo-stiped forms, conjoined by a straight connecting process of greater or less extent, with the radicle point in the centre, though often obscurely marked. This connecting process is always destitute of cellules, and this with its divisions I have termed the funicle.
Page 98 - I., pi. 74, fig. 1, perhaps not the European species of that name), but the branches are stronger and the serrations coarser ; it is moreover associated with a group of species, all or nearly all of which are quite distinct from those of New York with which the G. Sagittarius occurs. Plate V. Fig. 1. A part of an individual of this species showing the exterior side with the disk partially preserved, with parts of the eight branchlets, which are seen to be gradually turned to one...