. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . 278 MARINE INVERTEBRATES it is brick-red above and yellowish beneath. It inhabits rocky shoresonly and is found at low tide on the surface of the rocks, where it is ex-posed to the action of the waves and also to the attacks of birds ofprey, which feed upon it, while C. irroratus, concealed under the rocksin the same locality, escapes their depredations. This species is suppliedto the Newport market, where it is considered preferable to the bluecrab. Its range is from the east
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . 278 MARINE INVERTEBRATES it is brick-red above and yellowish beneath. It inhabits rocky shoresonly and is found at low tide on the surface of the rocks, where it is ex-posed to the action of the waves and also to the attacks of birds ofprey, which feed upon it, while C. irroratus, concealed under the rocksin the same locality, escapes their depredations. This species is suppliedto the Newport market, where it is considered preferable to the bluecrab. Its range is from the eastern end of Long Island to Nova magister. This species inhabits the Pacific coast and ranges fromAlaska to Lower California. The adult male is from seven to nine inchesbroad and from four to five inches long. The anterior margin of thecarapace is an almost regular elliptical curve with nine small teeth oneach side. At the end of the curve a large, pointed tooth projectsdirectly outward, and from this the carapace slopes abruptly backward,giving a narrow posterior end. The surface of the carapace is undu-. Cancer magister, the common crab of the Pacific coast; male. lated and covered with papillae, and is light reddish-brown, shading tolighter color in the back. The color of the legs and under surface of theanimal is yellowish. The claws are toothed above and ribbed at thesides. It inhabits sandy bottoms below tide-mark and is the largest andmost important edible crab of the western coast. C. productus, the red crab. This species, like the preceding one, isof large size and inhabits the western coast from Alaska to the Gulf ofCalifornia. The carapace is four and a half inches in length, from fiveto seven in breadth, and somewhat elliptical in outline. The teeth onthe anterior margin are distinctly separate in the adult, but in theyoung appear as wrinklings of the edge of the carapace. The posteriormargins are concave. In color the animal is dark red above and yellow-ish
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
