. Economic mollusca of Acadia . Fig. 12.âModiola modiolm. Natural size. It never has the blue black color of Al. eduik, but instead has an â epidermis of a dark chestnut or brown color. The umbo (or centre around which the lines of growth of the shell are arranged) is at the anterior or small extremity in M. edidk, but set a little back on the hinge margin in this species. It does not, however, live in great beds above low-water mark as 'does M. eduUs. It prefers gravelly and stony bottoms to which, half buried in the former, and half hidden in crevices in the latter, it

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188