Text-book of comparative anatomy . 294 GOMPAEATIVE ANA TOMY CHAP. Order 2. Isopoda. Body broad, often flattened dorso-ventrally. Only the foremost thoracic seg-ment is fused with the head, the other 7 are free. No freely projecting shell & «WGT\\,Vr **ed a •& Jr FIG. 19.— Organisation of Orchestia cavlmana, male (after Nebeski). c+I, Head+1st thoracicsegment; II-VIII, free thoracic segments with their extremities; PI-PJ, abdominal segments; «j,anterior, «o, posterior antenna ; a, eye ; K, oesophagus ; kf, foot-jaw ; br, gills ; Im, ventral chord ;g, brain; aoa, anterior aorta; sm, cesop
Text-book of comparative anatomy . 294 GOMPAEATIVE ANA TOMY CHAP. Order 2. Isopoda. Body broad, often flattened dorso-ventrally. Only the foremost thoracic seg-ment is fused with the head, the other 7 are free. No freely projecting shell & «WGT\\,Vr **ed a •& Jr FIG. 19.— Organisation of Orchestia cavlmana, male (after Nebeski). c+I, Head+1st thoracicsegment; II-VIII, free thoracic segments with their extremities; PI-PJ, abdominal segments; «j,anterior, «o, posterior antenna ; a, eye ; K, oesophagus ; kf, foot-jaw ; br, gills ; Im, ventral chord ;g, brain; aoa, anterior aorta; sm, cesophagal stomach; iul, unpaired intestinal crecuni; od, egg-bearing part of the germ glands ; h, heart; t, testis ; vs, vesica seminalis ; de, ductus ejaculatorius ;ehd, entrance of the urinary gland (hd) into the intestine; aop, posterior aorta; I, ends of thehepatic tubes ; ed, posterior end of the intestine. The 2 pairs of niaxilloe without feelers. Abdomen generally short, often reduced,mostly consisting of 6 segments with biramose lamellated pleopoda, whose branches,especially the endopodites, function as gills. Heart in the abdomen, generallystretches as far as into the posterior thoracic region, with 1 to 2 pairs of o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
