Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 ' Spire. W, whorls. Lines of Growth .„ Umbilicus Columella. Outer lip. . Aperture. • Canal. Names of the parts of a Gasteropod Shell. FIG. 544. =;?;-?;-;-|-;^-;- s - - J- .1 -rrrrr «M^_ JX sn - I — J jj — y Jj£ l^/ Ik/ «j j u 'J V a v!« W Jlvl vl^lV/ wi^iwiu:^ wlwl- July a£fiSbi^iaS=!- - 5 i - g 3 J2 5 « J « ci; iji} CN 2w*!5S -M** ''i- ^y ,, , lei Lingual teeth of Achatina, with central and lateral teeth enlarged. FIG. 545. Tongue of the Whelk, Buccinum undatum. Woodward. shell when they withdr
Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 ' Spire. W, whorls. Lines of Growth .„ Umbilicus Columella. Outer lip. . Aperture. • Canal. Names of the parts of a Gasteropod Shell. FIG. 544. =;?;-?;-;-|-;^-;- s - - J- .1 -rrrrr «M^_ JX sn - I — J jj — y Jj£ l^/ Ik/ «j j u 'J V a v!« W Jlvl vl^lV/ wi^iwiu:^ wlwl- July a£fiSbi^iaS=!- - 5 i - g 3 J2 5 « J « ci; iji} CN 2w*!5S -M** ''i- ^y ,, , lei Lingual teeth of Achatina, with central and lateral teeth enlarged. FIG. 545. Tongue of the Whelk, Buccinum undatum. Woodward. shell when they withdraw within. It is a horny plate, sometimes strengthened by shelly matter.
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