. A manual of zoology. i5S MANUAL OF ZOOLOGY fresh condition, but presents a certain limited degree of flexibility. The body (Fig. 86) is star-shaped, consisting of a central part, the central disc, and five symmetrically arranged processes, the arms or rays, which, broad at the base, taper slightly towards their outer extremities. There are two surfaces, one the dorsal or abactinal, directed up-. FlG. -Starfish. General view of the ventral surface, showing the tube-feet. (From Leuckart and Nitsche's Diagrams.) wards in the natural position of the living animal; the other, the ventral or actin
. A manual of zoology. i5S MANUAL OF ZOOLOGY fresh condition, but presents a certain limited degree of flexibility. The body (Fig. 86) is star-shaped, consisting of a central part, the central disc, and five symmetrically arranged processes, the arms or rays, which, broad at the base, taper slightly towards their outer extremities. There are two surfaces, one the dorsal or abactinal, directed up-. FlG. -Starfish. General view of the ventral surface, showing the tube-feet. (From Leuckart and Nitsche's Diagrams.) wards in the natural position of the living animal; the other, the ventral or actinal, directed downwards. The dorsal sur- face is convex, the ventral flat; the colour of the former is much darker than that of the latter. In the centre of the ventral surface (see Fig. 92) is a five- rayed aperture, the actinostome, and running out from this in a radiating manner are five narrow grooves, each running along the middle of the ventral surface of one of the arms. 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1900
