. A manual of zoology. PHYLUM ECHINODERMATA 167 The starfish is unisexual, each individual possessing either ovaries (Fig. 88, ov) or testes, which appear very similar until they are examined microscopically. They consist of masses of rounded follicles, like bunches of minute grapes, a pair in each inter-radial interval. The ducts, by means of which the ova, or sperms, reach the. Fig. 91. — Anthenea. View of dorsal surface. (After Sladen.) exterior, open on the dorsal surface (Fig. 88, A, Ovrf) through a number of perforations on a pair of sieve-like plates, situated inter-radially close to th
. A manual of zoology. PHYLUM ECHINODERMATA 167 The starfish is unisexual, each individual possessing either ovaries (Fig. 88, ov) or testes, which appear very similar until they are examined microscopically. They consist of masses of rounded follicles, like bunches of minute grapes, a pair in each inter-radial interval. The ducts, by means of which the ova, or sperms, reach the. Fig. 91. — Anthenea. View of dorsal surface. (After Sladen.) exterior, open on the dorsal surface (Fig. 88, A, Ovrf) through a number of perforations on a pair of sieve-like plates, situated inter-radially close to the bases of the arms. Other starfishes, while resembling Asterias in most re- spects, differ from it in a number of less important points. Thus though the number of arms is usually five, in some species it is eight, in others more, and in some of those with. 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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