. The shell book . LARGE MARINE SNAILS1 Paper Fig Shell, Pyrula papyralia. 2 Turnip Shell, Rapa rapiiormis. 3 Grinning Tun Shell, ilalea Ml il >\ ,\\1> OTHERS 3 Velvet Shell. \-fl,,lm,i 5 Moon Shell. Kalica hens. < anrcna. 6 Same, showing internal structure. The Moon Shells and Velvet Shells The Western Moon Shell (N. Lewisii, Gld.) is the largestspecies known. The shell is lighter and thinner than in N. spiral striations are seen on the whorls; the body whorlhas an angular shoulder. The outside is yellowish white, thelining polished and stained brown. A
. The shell book . LARGE MARINE SNAILS1 Paper Fig Shell, Pyrula papyralia. 2 Turnip Shell, Rapa rapiiormis. 3 Grinning Tun Shell, ilalea Ml il >\ ,\\1> OTHERS 3 Velvet Shell. \-fl,,lm,i 5 Moon Shell. Kalica hens. < anrcna. 6 Same, showing internal structure. The Moon Shells and Velvet Shells The Western Moon Shell (N. Lewisii, Gld.) is the largestspecies known. The shell is lighter and thinner than in N. spiral striations are seen on the whorls; the body whorlhas an angular shoulder. The outside is yellowish white, thelining polished and stained brown. A callus lobe narrows themouth of the deep umbilicus. This snail of prey has thesame predatory habits as its counterpart of the east , 3 to 5 inches. Habitat.— California to Alaska, Japan. N. duplicata, Say, has a flatter spire and a smoother shellthan , with bluish tinge on the pale brownish upper distinguishing feature is a thick brown lobe that extendsover the wide umbilicus, but does not quite close it. The spiralumbilicus is also distinctive. The sand collar is ruffled on itsouter border. This species
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Keywords: ., bookcentury1900, bookdecade1900, bookidshellbook00r, bookyear1908
