. Zoology : for students and general readers . Zoology. Fig. 143.—BalanoqJossJjs, not fully mature; magnified. Fig. 144.—Larva (TornaHa) of Balanoglossus. a, anus ; &, branch of water-vaBcu- lar system leading to the dorsal pore fdj; e, eye-speck ; g^ gills ; A, heart; i, in- testine; 771, mouth; in\ muscular hand from the eye to the water-vascular tube ; o, cesopbagus ; s, stomach or alimentary canal; w, lappet of stomach ; u\ anal band of cilia ; w, water-system.—After A. Agassiz. ventral vessel. The worm lives in sand at low-water mark from Cape Ann to Charleston, S. C. The lif
. Zoology : for students and general readers . Zoology. Fig. 143.—BalanoqJossJjs, not fully mature; magnified. Fig. 144.—Larva (TornaHa) of Balanoglossus. a, anus ; &, branch of water-vaBcu- lar system leading to the dorsal pore fdj; e, eye-speck ; g^ gills ; A, heart; i, in- testine; 771, mouth; in\ muscular hand from the eye to the water-vascular tube ; o, cesopbagus ; s, stomach or alimentary canal; w, lappet of stomach ; u\ anal band of cilia ; w, water-system.—After A. Agassiz. ventral vessel. The worm lives in sand at low-water mark from Cape Ann to Charleston, S. C. The life-history of this worm is most interesting. The young, originally described under the name of Tornaria, was supposed to be an Echinoderm larva, though it closely resembles the larval Gepliyrea and Annelides. It is a trans- parent, minute, ciliated, slender, somewhat bell-shaped form (Fig. 145), with black eye-specks. When transforming to the worm condition, a pair of gills arise on sac-like out- growths of the oesophagus, and afterwards three additional. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
