. West American shells; a description in familiar terms of the principal marine, fresh water and land mollusks of the United States found west of the Rocky Mountains, including those of British Columbia and Alaska ... -nel runs under the line of holes. The interior isvery iridescent, a light color prevailing, and themuscle-scar is not distinct. After the shells which have several holes, whichwe have just considered, there come a numberhaving only one opening, which answers the samepurpose. First, we will consider Puncturellamajor, Dall, the GreaterPuncturella, Figure289. It is not a com-mon sh
. West American shells; a description in familiar terms of the principal marine, fresh water and land mollusks of the United States found west of the Rocky Mountains, including those of British Columbia and Alaska ... -nel runs under the line of holes. The interior isvery iridescent, a light color prevailing, and themuscle-scar is not distinct. After the shells which have several holes, whichwe have just considered, there come a numberhaving only one opening, which answers the samepurpose. First, we will consider Puncturellamajor, Dall, the GreaterPuncturella, Figure289. It is not a com-mon shell, but it showsthe features of thegenus in a fine color is white, itsinternal margin crenu-late, and the posteriorslope slightly fine, large shellwas dredged in BeringSea. i^^ig- 2*9 (*) Puncturella galedtea, Gould, the Helmet Punc-turella, is an inhabitant of Puget Sound and adja-cent waters. The shell is conical and elevated,being about as high as it is broad. The fissure atthe summit is narrow, and internally there is alittle pit on each side of the hole-channel. Colorwhitish; length 10mm. Puncturella cuculdta, Gld., the Cap Puncturella,is found in Puget Sound, also at Monterey. The. 258 WEST AMERICAN SHELLS shell is oval, obliquely conical, ribbed, the wedge-shaped puncture opening towards the shorter a curved partition separates the punc-ture from the apex of the shell. The color is purewhite within, dirty white without. My specimenfrom Monterey measures 28mm. in length and 14millimeters in height. Punctnrella cooperi, Cpr., Coopers Puncturella,resembles C. galeatea, but the internal plate is
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmollusks, bookyear190
