The Canadian Naturalist and Quarterly Journal of Science: With the Proceedings of the Natural History Society of Montreal..., Том 1B. Dawson, 1857 |
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Стр. 40
... valve more flattened than the other . In this species , the ven- tral valve above figured is the most convex or ... dorsal valve is nearly straight along the hinge line , flat- tened or but slightly convex , and in most specimens with a ...
... valve more flattened than the other . In this species , the ven- tral valve above figured is the most convex or ... dorsal valve is nearly straight along the hinge line , flat- tened or but slightly convex , and in most specimens with a ...
Стр. 41
... dorsal valve more convex than in the prevailing forms of the Trenton Limestone . ” In England it is found in the Llandeilo and Caradoc formations of the Lower Silurian . In Canada it ranges from the Black River Limestone upwards ...
... dorsal valve more convex than in the prevailing forms of the Trenton Limestone . ” In England it is found in the Llandeilo and Caradoc formations of the Lower Silurian . In Canada it ranges from the Black River Limestone upwards ...
Стр. 129
... dorsal and ventral valves . Fig . 1 shews the ventral valve of Orthis tricenaria , a Trenton Limestone species , very abundant in that rock at the lower end of the ... dorsal valve 9 Technicalities of Fossil Shells . 129 ORTHIS TRICENARIA.
... dorsal and ventral valves . Fig . 1 shews the ventral valve of Orthis tricenaria , a Trenton Limestone species , very abundant in that rock at the lower end of the ... dorsal valve 9 Technicalities of Fossil Shells . 129 ORTHIS TRICENARIA.
Стр. 130
... dorsal valve of the same species , the ventral Beings removed to shew some of the internal appendages . The two projecting points are supposed to have been the supports of the fleshy arms which constitute : the distinguishing feature in ...
... dorsal valve of the same species , the ventral Beings removed to shew some of the internal appendages . The two projecting points are supposed to have been the supports of the fleshy arms which constitute : the distinguishing feature in ...
Стр. 133
... valves have an area , and the foramen is partly excavated in both . The foramen of the dorsal valve is partly filled by a small cardinal tooth - like process , from which a small rounded ridge proceeds along the interior surface of the ...
... valves have an area , and the foramen is partly excavated in both . The foramen of the dorsal valve is partly filled by a small cardinal tooth - like process , from which a small rounded ridge proceeds along the interior surface of the ...
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abundant animal appearance Arctic Arctic Fox ARTICLE Audubon Azoic beak bear beds beneath birds body breeding brown brownish called Canada Carboniferous colour common common Snipe continent coral covered deer deposit Devonian dorsal valve Duck dusky eggs Esox feathers feet female fins fish formation fossil frequently genus geological grey grizzly bear ground habits hair head horns hunter inches Inhabits insects Lake lamellæ larvæ legs length limestone Lower Canada Lower Silurian male miles moose Mountains musk ox nearly neck nest North America northern Nova Scotia observed Ottawa Partridge portion Protichnites pupa quadrupeds rays Red Fox remains resembling River rocks sandstone season seen shell shore side skin Snipe snow sometimes species specimens spot striæ surface tail teeth thickness tipped tree Trenton Trenton Limestone trilobites upper ventral valve wings winter wolf woods yellowish young