. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. 11,. •%^s HtUjjii 11 l->&£#iU*iik«K Fig. 13. Description.—Subquadrate, laro-e, very gibbous, hinge-line less than the greatest width of the shell; front margin gently convex, straight or slightly concave; front angles rounded ; a portion of the sides, equal to about one third the length along the middle, usually straight, but sometimes a little convex, above which the sides curve inward to the cardinal angles. The ventral valve is moderately and somewhat irregularly con- vex, the beak small, pointed, and much
. The Canadian naturalist and geologist. Natural history -- Periodicals. Fig. 11,. •%^s HtUjjii 11 l->&£#iU*iik«K Fig. 13. Description.—Subquadrate, laro-e, very gibbous, hinge-line less than the greatest width of the shell; front margin gently convex, straight or slightly concave; front angles rounded ; a portion of the sides, equal to about one third the length along the middle, usually straight, but sometimes a little convex, above which the sides curve inward to the cardinal angles. The ventral valve is moderately and somewhat irregularly con- vex, the beak small, pointed, and much elevated. In most of the specimens a broad, low, mesial riclge or depressed fold extends. 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, Dawson
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Keywords: ., bookauthornaturalh, bookcentury1800, bookdecade1850, bookyear1859
