First lesson in zoology : adapted for use in schools . Fig. 48. —Asterias vulgaris. (Natural size.) Fio. 49. —Brachiolaria ofAslerias vulgaris^ en-larged, with the star-fish (r) developing atthe aboral end; e, me-dian anal arm; e*, oddterminal oral arm; /,brachiolarv arm; j^^branch of water-tube{v)w) leading into /,odd brachiolur arm. The changes or transformations of the starfish as well asother Echinoderms are intimately connected with the pres-ervation of the species. Full-grown starfish are heavy,slow, inert creatures, and do not move far away from theirhomes among oysters, mussels, and un
First lesson in zoology : adapted for use in schools . Fig. 48. —Asterias vulgaris. (Natural size.) Fio. 49. —Brachiolaria ofAslerias vulgaris^ en-larged, with the star-fish (r) developing atthe aboral end; e, me-dian anal arm; e*, oddterminal oral arm; /,brachiolarv arm; j^^branch of water-tube{v)w) leading into /,odd brachiolur arm. The changes or transformations of the starfish as well asother Echinoderms are intimately connected with the pres-ervation of the species. Full-grown starfish are heavy,slow, inert creatures, and do not move far away from theirhomes among oysters, mussels, and under stones or sea-weed; but in their infant or larval stages they are, as wehave s^en, entirely difEerent creatures, swimming as trans-parent, animated bits of pinkish jelly at the top of thewater, and borne about in vast numbers by the ocean cur-rents hundreds of miles from their birthplace. Perhapsthey would be snapped up by fishes and other animals weretheir bodies not so transparent; as it is, were all the adult 8TABFI8H, SEA-TmOHIN8 AND SEA-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1894
