. The Canadian record of science. Natural history. Obolus pulchek, n. sp. Kg. 1. Ventral valve. Natural size- " 2. Same, mag. 2i, to show the surface markings. The dotted line near the top of the figure indicates the outline of the dorsal valve at that part. Fig. 3. Embryonic shell, Dorsal valve, mag. -^j^. " 4. Same, seen from behind. " 5. Same, seen from the side. " 6. Embryonic shell. Ventral valve, mag-\^-. " 7. Same, seen from behind.^ " 8. Same, seen from the side. General outline nearly orbicular; the valves gently, but rather flatly and evenly arched down
. The Canadian record of science. Natural history. Obolus pulchek, n. sp. Kg. 1. Ventral valve. Natural size- " 2. Same, mag. 2i, to show the surface markings. The dotted line near the top of the figure indicates the outline of the dorsal valve at that part. Fig. 3. Embryonic shell, Dorsal valve, mag. -^j^. " 4. Same, seen from behind. " 5. Same, seen from the side. " 6. Embryonic shell. Ventral valve, mag-\^-. " 7. Same, seen from behind.^ " 8. Same, seen from the side. General outline nearly orbicular; the valves gently, but rather flatly and evenly arched down from the centre all around, except that the dorsal is flatter at the back than elsewhere, and the ventral valve runs out into a short acu- minate umbo. Dorsal valve somewhat wider than long; more strongly arched towards the front than elsewhere ; somewhat elevat- ed at each end of the hinge line. Yentral valve about as wide as long, sides and front even- ly rounded; back produced into a short pointed beak, angle of incidence of the two sides, 110° to 120°, Sculpture of the posterior half of the valves, consisting of minute tubercles, sloping forward, and arranged in rows, which arch forward across the mesian line from each late- The angle at each side is an error of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Montreal. Montreal, Natural History Society
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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1884
