. A manual of zoology. Zoology. III. ANNELIDA: ;T0P0DA 271 to form the ventral chain, which consists of as many pairs of ganglia, united by longitudinal commissures, as there are somites present. These ganglia of the ventral chain are closely similar, since the segmentation of the body is homonomous. There is but the slightest division of labor. Fig. 253.—Anterior end of Nais elinquls. h, cerebrum, connected by commissure wdth ventral chain, n\ dg, dorsal, vg, ventral blood-vessel; m, muscular layer of skin; df, vf, dorsal and ventral cha^tts; d, septa; k, prostomium; 0, mouth. among the s
. A manual of zoology. Zoology. III. ANNELIDA: ;T0P0DA 271 to form the ventral chain, which consists of as many pairs of ganglia, united by longitudinal commissures, as there are somites present. These ganglia of the ventral chain are closely similar, since the segmentation of the body is homonomous. There is but the slightest division of labor. Fig. 253.—Anterior end of Nais elinquls. h, cerebrum, connected by commissure wdth ventral chain, n\ dg, dorsal, vg, ventral blood-vessel; m, muscular layer of skin; df, vf, dorsal and ventral cha^tts; d, septa; k, prostomium; 0, mouth. among the somites, and hence they differ but slightly among themselves. The prostomium always bears tactile organs and frequently eyes, which in many marine forms are highly developed, with lens, vitreous body, od, im. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
