. 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 ... 111. The shell is strongand solid, globose conical, with arounded apex and five regularwhorls. The surface is reticu-lated or cut into fine checks by thecrossing of spiral threads and the lines of color varies from white to brown, and thewhorls are often banded, while the upper half ofeach whorl is usually darker than the correspond-ing lower half. The animal is said t
. 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 ... 111. The shell is strongand solid, globose conical, with arounded apex and five regularwhorls. The surface is reticu-lated or cut into fine checks by thecrossing of spiral threads and the lines of color varies from white to brown, and thewhorls are often banded, while the upper half ofeach whorl is usually darker than the correspond-ing lower half. The animal is said to be from Santa Barbara Island. Epiphragmophora kellettii, Fbs., KellettsSnail. The shell consists of six whorls, spirerather low, umbilicus nearly closed. Shell smooth,color varying from whitish to brown, usuallymottled, with a dark ring around the center of thebody-whorl. Diameter about an inch. From Cata-lina Island, where it is reported as plentiful onand under the old cactus branches. Epiphragmophora stearnsidna, Gabb., StearnssSnail, is sometimes called a variety of the lastspecies. The shell is narrowly umbilicated, solid,with fine incremental strijp. Wliitish, with ash- AIR-BREATHERS 137. Fig. 112 colored spots and a brown band. Fonnd on theseaweed side of Point Lonia, San Diego, wheremost of the specimens are dead, and in LowerCalifornia. Epiphragmophora arnheimi, Dall, ArnheimsSnail. This small snail is fonnd in Costra CostaCo., Cal., near San Pablo. Its diameter is ^he snture is deep, also the nmbilicus, while thelip is unusually thick for the size of the shell. Glyptostoma newherrydnum,W. CI. Binney, Newberrys Snail,is a very distinct species, foundin southern California, particu-larly around San Diego. A basalview of a small specimen is shownin Figure 112, for large onesgrow to a diameter of an inch and a half. Thespire is flattened, and the umbilicus is very large,distinctly showing the coil of rounded whorls. Thelip of the aperture is thin and
Size: 1688px × 1480px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectmollusks, bookyear190
