The Book of Shells offers a visually stunning and scientifically engaging guide to six hundred of the most intriguing mollusk shells, each chosen to convey the range of shapes and sizes that occur across a range of species.
... fastigiate venter . Another specimen from the same locality as Quinn's example ( UA loc . L18 ) , showing an ... shell . The umbilical shoulder is prominent , suban- gular , and the umbilical wall is nearly flat . No well- defined ...
This beautifully illustrated guide, Seashells of North America by R. Tucker Abbott, helps both the novice and experienced shell hunter distinguish between similar varieties and find the glorious specimens that become a collection's prize.
No two shells are identical. The motionless patterns appear to be static, and, indeed, they consist of calci?ed material. However, as will be shown in this book, the underlying mechanism that generates this beauty is eminently dynamic.
... shell form of Hauericeras ; the sharpened venter of Mossamedites represents ... shell is strongly compressed and moderately evolute , with slightly ... fastigiate venter , resulting in a compressed , sublanceolate whorl section ...
... fastigiate venter . Another specimen from the same locality as Quinn's example ( UA loc . L18 ) , showing an ... shell . The umbilical shoulder is prominent , suban- gular , and the umbilical wall is nearly flat . No well- defined ...