. 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. nlso a fine species of Diplodus, whicli appears to be now, and which I havo named I), acinaces. Its lateral denticles arc compressed and sharp-edged, but scarcely crenulatcd, and both bent in tliu same direction. Middle cone obsolete ; base largo and broad. One denticle is usually much larger than the other. The greatest diameter of the larger denticle is

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. 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. nlso a fine species of Diplodus, whicli appears to be now, and which I havo named I), acinaces. Its lateral denticles arc compressed and sharp-edged, but scarcely crenulatcd, and both bent in tliu same direction. Middle cone obsolete ; base largo 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 six lines from the lower side of the base to the point of tho longest denticle, and the base is four lines broad (Fig. i>Ji). T regard as probably belonging to this iish certain cylindrical spines found in tho saino bed. They are about half an inch in diameter, Avith nearly central canal two lines in diameter, and aro marked externally with parallel longitudinal 8tria3. Among fossils from Pictou forwarded to mo by Mr Poole, there is a new Dijdodiis [D. penetrans), Fig. 57. This is smaller than D. acinaces of the Main (Joal. Its height is about two and a half lines, and the breadth nearly the Fig. 57. same. Tho lateral points aro 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 tho central denticle is small and conical. The base is broad and strongly lobcd. These teeth occur in the roof of beds of coal near to and above New Glasgow conglomerate, and in the roof of the Main Coal.* In the same collection is a small tooth of Ctenoptyddus with eight denticles;—the specimen is an imperfect impression. There are also remains of several ganoid fishes. One of these is a conical curved tooth, half an inch long, smooth on the convex side, and marked on tho concave side with five spiral ridg

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