. The animal creation: a popular introduction to zoology. Zoology. -<^/'. Fig. 224.—vermetus. is bent forwards until it reaches beyond the head, where it swells out into a protuberance furnished with a thin operculum; this serves as a door where- with to close the entrance of the tube when the animal retreats into its shelter. The head of these Mollusks is provided with two tentacula of moderate size, at the bases of which the eyes are situated: the mouth is a simple vertical slit (Fig. 224). OllDER SCUTIBRANCHIATA.* The animals belonging to this order have their shells very widely open, an
. The animal creation: a popular introduction to zoology. Zoology. -<^/'. Fig. 224.—vermetus. is bent forwards until it reaches beyond the head, where it swells out into a protuberance furnished with a thin operculum; this serves as a door where- with to close the entrance of the tube when the animal retreats into its shelter. The head of these Mollusks is provided with two tentacula of moderate size, at the bases of which the eyes are situated: the mouth is a simple vertical slit (Fig. 224). OllDER SCUTIBRANCHIATA.* The animals belonging to this order have their shells very widely open, and frequently not at all spiriform, so that they cover the back, as it were, with a broad shield. The Sea-ears {Haliotis) are the most beautiful and richly ornamented of the group ; their shell is slightly spiral at its commencement, but rapidly expands, so * Scutum, a shield; brancliise, gills— 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 Jones, Thomas Rymer, 1810-1880. London : Society for Promoting Knowledge
Size: 3286px × 761px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorjo, bookcentury1800, bookdecade1860, booksubjectzoology
