. 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 OF THE COAL. 209 the tail-joint of SUmonia [Pterygotus] acuminata. There arc no surface markings or marginal ; Locality.—Coal measures, Joggins, IV. Fishes.—Remains of fishes occur in connexion with eighteen of the coal-beds at the Joggins,
. 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 OF THE COAL. 209 the tail-joint of SUmonia [Pterygotus] acuminata. There arc no surface markings or marginal ; Locality.—Coal measures, Joggins, IV. Fishes.—Remains of fishes occur in connexion with eighteen of the coal-beds at the Joggins, usually in the roof-shales, though detached scales, teeth, spines, or coprolites, are of occasional though rare occurence in the coal itself, especially where the latter passes into coarse coal or carbonaceous shale. One thin bed, No. 6 of Division 4 of the Section, is full of remains of small fishes. It is hard and laminated, and roofed with a calcareous bed full of remains of aquatic animals. It has a true stigmarian underclay. I suppose it to have been a swamp or forest submerged and occupied by fishes while its vegetation was still standing. It contains remains of fishes of the genera Ctenoptychius, Diplodus, Ehizodus, and Palceoniscus. It also contains Cythere, Naiadites, and Spirorbis. In the other beds which contain fish-remains, most of these consist of small Lepidoganoids, but there are occasional teeth and scales of large species of Rhizodus, and also teeth of Selachian fishes of considerable size. Among these I have in my collection a tooth of a Ctenoptychius (Fig. 52), differing from any species of which I have seen a description. Fig. ?2.— Tooth of Ctenopfyehius cristatus, ; nat. size and It is two lines in length, with fourteen sharp denticles, much compressed, and with a narrow base. Another very fine tooth found in these beds appears to belong to M'Coy's genus Conchodus (Fig. 53). It has seven Tig. .^3.— Tooth of Conchodusplicaius,
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