. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... CHAPTER IV. Belchers Chorus — Nuttalls Hornmouth—AnotherHornmouth—What is Meant by Species—Comparedto the Colors op the Rainbow—The UnicornShells—Why Shore Shells are so Strong—Adviceto Observers—Tyrian Purple—The Rock Purple—Its Varieties—The Grooved Purple—The WrinkledPurple. THE large mollusk whose shell is shown in Fig. 7is such a lover of the warm waters which bathe the coast of Southern California, that it never migrates far to the north, but i
. West coast shells. A familiar description of the marine, fresh water, and land mollusks of United States, found west of the Rocky Mountains ... CHAPTER IV. Belchers Chorus — Nuttalls Hornmouth—AnotherHornmouth—What is Meant by Species—Comparedto the Colors op the Rainbow—The UnicornShells—Why Shore Shells are so Strong—Adviceto Observers—Tyrian Purple—The Rock Purple—Its Varieties—The Grooved Purple—The WrinkledPurple. THE large mollusk whose shell is shown in Fig. 7is such a lover of the warm waters which bathe the coast of Southern California, that it never migrates far to the north, but isfound in the vicinity ofSan Diego. The engra-ving is of about half thelength of a good sizedspecimen, though some ofthese shells are foundwhich are fully six incheslong. It may sometimesbe picked up upon mudflats at the time of lowtide. Its name is ChorusBelcher i, Hds., Ko-rusBelch/-er-i, or BelchersChorus. The shell as awhole is somewhat pear-shaped, ending in a longFis- 7- canal, to the left of which is a deep, funnel-shaped umbilicus. The spire is. 26 THE HORN-MOUTH. conical, quite rough and jagged, and the body whorlis guarded by a crown of strong, sharp points. Theoperculum, like that of all similar shells, is thin andhorny. The color of the shell is a dull white, some-what tinged with brown. Fig. 8 introduces us to another southern shell,Cerostoma Nuttallii, Conr., Se-ros-to-ma Nutt-all-i-i,which we may translate as Nuttalls Hornmouth. Inthe latter part of the book you will find a brief noticeof Mr. Nuttall, for whom this species was named byMr. Conrad, about whom also you will find a fewwords. If you examine a full-grownshell of this species you will find asharp tooth, or horn, near the baseof the outer lip. The presence ofthis horn on the rim of the apertureis so peculiar a feature that a namewas chosen for the genus whichshould indicate its presence. Weshall find the Greek word for mouth,stoma, combined in various ways toform the names of diff
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188
