. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. â â¢f,. FLORA OF THE DEVONIAN. Ul Neuropterts Dawsoni, Hartt (Fig. 193). This remarkable fern, discovered by Mr Hartt, and to which he has done me the honour to attach my name, presents curious points of affinity to Cyclopterids and Neuropterids, and perliaps may, when more fully known, be placed in a distinct genus. Mr Hartt describes it as follows:â
. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. â â¢f,. FLORA OF THE DEVONIAN. Ul Neuropterts Dawsoni, Hartt (Fig. 193). This remarkable fern, discovered by Mr Hartt, and to which he has done me the honour to attach my name, presents curious points of affinity to Cyclopterids and Neuropterids, and perliaps may, when more fully known, be placed in a distinct genus. Mr Hartt describes it as follows:â " Frond, pinnate or bipinnate (most probably the latter); rachis thick, sometimes when compressed half an inch wide, coarsely striated, always winged; pinnae (pinnules?) alternate, very oblique, linear lanceolate, moderately acute at apex, slightly notched above its base, decurrent on the rachis, often about an inch in width, and sometimes six inches long; margin strong, a few large undulations; midrib thick, tapering gradually, disappearing before reaching the apex, straight, entering a pinna (pinnules ?) obliquely from the upper side, giving oflF very numerous nerves, which spring very obliquely from it, ' ning about parallel with it, forking once near the midrib, and once more half-way to the margin, sometimes again close to the margin, the whole series being strongly arched. " The pinnae, particularly when the midribs are thick, show a strong tendency to split up in a direction to the rachis. I have sometimes noticed them folded in a conduplicated ; Neuropteris crassa, sp. nov. Single pinnules, broad, oval, oblique at base, thick, smooth above with very numerous arched veins. A pinna with somewhat larger piimules similarly veined may belong to the same species. There are fragments which possibly indicate two other species of Neuropteris. Sphenopteris Ilceninghausi, Brongniart. One of the ferns from the shales near St John appears to be i
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
