The American Journal of Science and ArtsS. Converse, 1888 - Geology |
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Page 123
... genus Brachyphyllum , which closely resemble Potomac specimens . Wealden . The Wealden of England furnishes two species which also occur in the Potomac formation . These are Equi- setum Lyelli Mant . , and Sphenopteris Mantelli Brongn ...
... genus Brachyphyllum , which closely resemble Potomac specimens . Wealden . The Wealden of England furnishes two species which also occur in the Potomac formation . These are Equi- setum Lyelli Mant . , and Sphenopteris Mantelli Brongn ...
Page 128
... genus is chiefly Jurassic . Thinnfeldia is a large Jurassic genus ranging from the mid- dle Trias , but found also in the Cretaceous of Spitzbergen and Greenland . The Potomac species are , however , Rhetic in type . Angiopteridium has ...
... genus is chiefly Jurassic . Thinnfeldia is a large Jurassic genus ranging from the mid- dle Trias , but found also in the Cretaceous of Spitzbergen and Greenland . The Potomac species are , however , Rhetic in type . Angiopteridium has ...
Page 154
... genus ( if not the species ) of much earlier date than known from the American rocks . Prof. Delgado names them A. Harlani , although much larger than the American species . 6. British Petrography with special reference to the Igneous ...
... genus ( if not the species ) of much earlier date than known from the American rocks . Prof. Delgado names them A. Harlani , although much larger than the American species . 6. British Petrography with special reference to the Igneous ...
Page 162
... genus of the Trilobita , Embolimus , and five new species , and also mentions two other species of trilobites , several brachiopods , a species of Hyolithes and what he thinks may be a graptolite . There is no attempt made to give the ...
... genus of the Trilobita , Embolimus , and five new species , and also mentions two other species of trilobites , several brachiopods , a species of Hyolithes and what he thinks may be a graptolite . There is no attempt made to give the ...
Page 164
... genus of Hymenoptera in 1833.§ It was spelled Embolemus by Westwood and was corrected by Pro- fessor Agassiz in the Nomenclator Zoologicus The first species named under this genus by Dr. Rominger , Embolimus spinosa , was described as ...
... genus of Hymenoptera in 1833.§ It was spelled Embolemus by Westwood and was corrected by Pro- fessor Agassiz in the Nomenclator Zoologicus The first species named under this genus by Dr. Rominger , Embolimus spinosa , was described as ...
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