Archive image from page 128 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana01todd Year: 1836 apparatus in the phytophagous patella vulgata, fjig. 42.) Like most of the predaceous gas- teropods the buccinum is provided with a long muscular proboscis, (fig. 41, a, b,) capable of being extended to a distance from the mouth, and enclosing a bifid tongue covered with sharp recurved teeth. The oesophagus near the sto- mach dilates into a small crop (c), and to this succeeds a round membranous stomach (d, e). The whole remaining intestine is shorter than th
Archive image from page 128 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana01todd Year: 1836 apparatus in the phytophagous patella vulgata, fjig. 42.) Like most of the predaceous gas- teropods the buccinum is provided with a long muscular proboscis, (fig. 41, a, b,) capable of being extended to a distance from the mouth, and enclosing a bifid tongue covered with sharp recurved teeth. The oesophagus near the sto- mach dilates into a small crop (c), and to this succeeds a round membranous stomach (d, e). The whole remaining intestine is shorter than the oesophagus, and dilates into a wide colon (J',~) before terminating in the anus (g), on the right side of the body under the open mantle. The liver, of great size, and accompanying the testicle (i) in the turns of the spire, pours its secretion into the stomach as in the acepha- lous classes. The vas deferens following the right side of the body terminates at the end of the male organ (A) in a small tubular styhform duct. In the patella, (Jig. 42,) however, which feeds on marine plants, the mouth (a) is provided with a long slender convoluted tongue covered with numerous rows of teeth like a long file. The wide and sacculated oesophagus (d) leads to a capacious and lengthened stomach (f, g), surrounded by the large liver, and the' long convoluted intestinal canal (h) makes several turns imbedded in the mass of the liver before it arrives at the short Fig. 42. dilated rectum (i) and anus (/c). The salivary glands are generally of great size in this class, and present some- times in the same species both the simple follicular and the conglome- rate forms. The pancreas likewise is often present in form of a single follicle opening into the sto- mach along with the biliary ducts. The inferior orders are mostly male and female, but VOL. I. in the higher forms the sexes are distinct. (See GASTEROPODA.) 17. Pteropoda, body organized for swim- ming, mantle closed above, branchia
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