. Zoology. Zoology. Fig. 68. —Brachiolaria of As- terias vulgaris, enlarged, with the star-fish (r) devel- oping at the aboral end. €, median anal arm; e^, odd terminal oral arm;/, brach- iolar arm; /, branch of wa- ter-tube (icv?') leading into /' odd brachiolar arm; /'", surface warts at base of odd brachiolar arnt Class III.—Echikoidea {Sea-urchins). General Characters of Sea-TTrchins.—A good idea of the general structure of sea-urcliins may be obtained by an ex- amination of the common sea-urchin, Echinus (Fig. 69),. Fig. G9.—The common Sea-urchin, Echinus drohachiensis. d. framework
. Zoology. Zoology. Fig. 68. —Brachiolaria of As- terias vulgaris, enlarged, with the star-fish (r) devel- oping at the aboral end. €, median anal arm; e^, odd terminal oral arm;/, brach- iolar arm; /, branch of wa- ter-tube (icv?') leading into /' odd brachiolar arm; /'", surface warts at base of odd brachiolar arnt Class III.—Echikoidea {Sea-urchins). General Characters of Sea-TTrchins.—A good idea of the general structure of sea-urcliins may be obtained by an ex- amination of the common sea-urchin, Echinus (Fig. 69),. Fig. G9.—The common Sea-urchin, Echinus drohachiensis. d. framework of mouth and teeth seen in front; c, the same se^n sideways; a, 6, side and ex- ternal view of a single tooth (pTramid); all natural 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. N. Y. , Holt
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1897
