. Acadian geology : the geological structure, organic remains, and mineral resources of Nova Scotia, New Brunswick, and Prince Edward Island. Geology -- New Brunswick; Geology -- Nova Scotia; Geology -- Prince Edward Island; Paleontology -- New Brunswick; Paleontology -- Nova Scotia; Paleontology -- Prince Edward Island. AQUATIC ANIMALS OP THE COAL. 211 also a fine species of Diplodus, wliicli appears to be new, and which I liave named D. acinaces. Its hitcral denticles are compressed and sharp-edged, but scarcely crcnulated, and both bent in the same direction. Middle cone obsolete ; base lar
. Acadian geology : the geological structure, organic remains, and mineral resources of Nova Scotia, New Brunswick, and Prince Edward Island. Geology -- New Brunswick; Geology -- Nova Scotia; Geology -- Prince Edward Island; Paleontology -- New Brunswick; Paleontology -- Nova Scotia; Paleontology -- Prince Edward Island. AQUATIC ANIMALS OP THE COAL. 211 also a fine species of Diplodus, wliicli appears to be new, and which I liave named D. acinaces. Its hitcral denticles are compressed and sharp-edged, but scarcely crcnulated, and both bent in the same direction. Middle cone obsolete ; base large and broad. One denticle is usually much larger than the other. The greatest diameter of the larger denticle is to its length as one to three. A tooth of ordinary size measures si.\ lines from the loAver side of the base to the point of the longest denticle, and the base is four lines broad (Fig. 58). I regard as probably belonging to this fish certain cylindrical spines found in the same bed. They are about half an inch in diameter, with nearly central canal two lines in diameter, and are marked externally with parallel longitudinal striaj. Among fossils from Pictou forwarded to me by Mr Poole, there is a new Diplodus [D. penetrans), Fig. 57. This is smaller than D. acinaces of the Main Coal. Its height is about two and a half lines, and the breadth nearly the pig. 57. same. The lateral points are half as broad as long, and flattened; rhombic in cross section at the base; serrated, especially at the outer and lower margins. They diverge at an angle of 35° to 40°, and the central denticle is small and ^ ^ , ^. , , ' , Teeth of Diplodus. conical. The base is broad and strongly lobed. These teeth occur in the roof of beds of coal near to and above the New Glasgow conglomerate, and in the roof of the Main Coal.* In the same collection is a small tooth of Ctenoptycliius with eight denticles;—the specimen is an imperfect impression. There are also remains of several ganoid fis
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Keywords: ., bookauthordawsonjohnwilliamsir1, bookcentury1800, bookdecade1870
