. 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, 207 Tlie following arc Mr Salter's descriptions of these interesting crustaceans, taken from his paper, Journal of Geol. Society, vol. xix.:— " DiPLOSTYLUs, gen. nov. " Carapace unknown. Body segments arched, and with minute pleura. Tail
. 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, 207 Tlie following arc Mr Salter's descriptions of these interesting crustaceans, taken from his paper, Journal of Geol. Society, vol. xix.:— " DiPLOSTYLUs, gen. nov. " Carapace unknown. Body segments arched, and with minute pleura. Tail segment large, triangular, spinose, with two pairs of simple ovate appendages. " DiPLosTYLus Dawsoni, spec. nov. (Fig. 49). " The portion preserved consists only of five rings and the broad telson; and these together are three-fourths of an inch long, and less Fig. 49.—Diplostylus (a) Tail, nat. hize; ih) terminal joint enlarged. tlian half an inch broad at the widest part. The telson is somewhat narrower than the body-rings, broad above, and pointed behind, where it is notched into three spines, the centre one very short, the two on each side of it broad, and on their outer sides covering the attachment of two small obovatc palettes. These palettes are a little oblique, narrower than their length, rounded at their posterior margin, and striated distinctly. Outside these, and much higher up on the sides, are a pair of broader notches, which give origin to a pair of small palettes, ovate and not broader at their ends, and striated obliquely; and above the insertion of these are a pair of broad, flat spines on the surface of the tail-joint. " The body segments are transverse, the axis not much distinguished from the short, pointed, recurved pleura, Avith a narrow articular furrow, and strongly punctate on the exposed portions. The puncta- tions (in the liinder segments only) are overhung by short plications: such punctations are observable in many Iso
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Keywords: ., bookauthordawsonjohnwilliamsir1, bookcentury1800, bookdecade1870
