Text-book of comparative anatomy . 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 endopo
Text-book of comparative anatomy . 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 ostia. CB USTA CEA— SYSTEM A TIC RE VIE W 295 Cymothoidea, hermaphrodite, some living free, others parasitic on fishes : Cymothoa,Anilocra, Cirolana, Ncrocila, Aega, almost exclusively marine forms. Sphccro»«</.free living, mostly marine, Sphccroma. Pranizidoe, free in the sea, the 3 anterior. Fio. 198.—Caprella acutifrons, afterP. Mayer. .4, male from the side ; B, fromthe back, aj, Anterior, a*, posterior an-tenna ; fcoj &3> &6> 67, *>8i 2(1 to Sth thoracicfeet, the 2d moved on to the throat; br,gills in the place of the 4th and 5th thor-acic feet; cth+I+II; cephalo-thorax=head+ lst and 2d thoracic segments; III-VIII,free thoracic segments; ab, truncatedabdomen. FIG. 199.—Diastylis stygia, male (afterG. O. Sars). oj, Anterior, a», posteriorantenna; cth, cephalo-thoracic shield ; II-VIII, free thoracic segments ; abj-a&y, ab-dominal segments ; j)j, 1st pleopod; p$, 6thpleopod ; en, endopodite ; ex, exopodite.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
