. Elements of conchology / Prepared for the use of schools and colleges. Mollusks. Fig. 76. HALIOTIS. is a double membrane cut in fringes and furnished with long filaments. On the outside of the tentacles we find two cylindrical pedicles, bearing the eyes; and the mouth is armed with a trunk or proboscis. The external surface of the shells of these mollusks are not remarkable ; but internally they are covered by a layer of nacre, of the richest and most beautifully iridescent colours. They are found in great num- bers on the rocky shores of California. o 30. The FissurellcB, \ {fig. 11) are re
. Elements of conchology / Prepared for the use of schools and colleges. Mollusks. Fig. 76. HALIOTIS. is a double membrane cut in fringes and furnished with long filaments. On the outside of the tentacles we find two cylindrical pedicles, bearing the eyes; and the mouth is armed with a trunk or proboscis. The external surface of the shells of these mollusks are not remarkable ; but internally they are covered by a layer of nacre, of the richest and most beautifully iridescent colours. They are found in great num- bers on the rocky shores of California. o 30. The FissurellcB, \ {fig. 11) are recog- nised by their conical shell placed upon the ^ middle of the back, and p pierced at its summit by a small opening, which serves to give Fig. 77.—fissurella. Explanation of Fig. 77.—p. the foot of the animal;—m. the mantle ;—o. the opening at the apex of the shell, and the anus. 28. "What are the characters of the scuti'branch ga'steropods ? (Scuti- branch, from the Latin, scutum, a shield, and branchics, gills.) 29. What are the characters of the JHalio'tides ? (Haliotides, from the Greek, als, the sea, and ous, ear ; sea-ear, or haliotis, and eidos, resemblance.) 30. How is the genus Fissure'lla recognised ? (Fissurella, Latin, Fis- eura, a slit.). 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 Ruschenberger, W. S. W. (William Samuel Waithman), 1807-1895; Comté, Achille, 1802-1866; Milne-Edwards, H. (Henri), 1800-1885. Philadelphia : Grigg & Elliot
Size: 2583px × 967px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, booksubjectmollusks, bookyear184
