. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . habit of rolling itself into Sphc&roma, destructor is a boringisopod, larger than Limnoria, and is evenmore destructive, since its holes are larger;but its range is limited, or, at least, it has sofar been found only in the St. Johns River,Florida. GENUS Idotea I. intn-inti (Linnaeus), /. irrorata(Edwards). This species is about one inchlong, ;ind is easily recognized by the ab-doiiici], I he first three segments of which arenarrow and terminate in acute teeth, while t
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . habit of rolling itself into Sphc&roma, destructor is a boringisopod, larger than Limnoria, and is evenmore destructive, since its holes are larger;but its range is limited, or, at least, it has sofar been found only in the St. Johns River,Florida. GENUS Idotea I. intn-inti (Linnaeus), /. irrorata(Edwards). This species is about one inchlong, ;ind is easily recognized by the ab-doiiici], I he first three segments of which arenarrow and terminate in acute teeth, while theother three are fused into one with straight,sides and ending in three teeth, of whichthe middle one is the longest. The first pairof abdominal feet are large, long, and plate-like, covering the otherleet and whole undersurface of the abdomen like an operculnni. /- The head is nearly square, the eyes are small, and the antenna have long peduncles. The articulations of thethoracic feet are fringed with hair. The color of this species varies:sometimes it is light or dark green, or brown with Mack spots; again. 294 MARINE INVERTEBRATES it is striped longitudinally with light color. Sometimes the stripes runtransversely in bands or spots. It is found from New Jersey northwardon rocky shores of bays and sounds, or in eel-grass on sandy shores. J. ochotensis. A species very similar to the preceding, but a littlelarger, found on the Pacific coast. I. metallica. This species is a little smaller than I. marina, and dif-fers from it in having the end of the telson truncated, or straight, insteadof dentate. The head is nearly square. The body is broadest in themiddle of the thorax ; the projecting epimera give a sen-ate appearanceto the sides. The abdominal feet are inclosed in the operculum-likescales of the first pair of feet. Its color is bright blue or green, oftenwith a metallic luster when seen in the water. It is found swimmingfree or floating in masses of seaweeds from Long Isla
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
