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It was created in 1932 for internal use by Shell, but later on licensed to every company who wished to pay for it. The system is a catalogue of specifications in the English language, to allow buyers to purchase standardised materials all over the world. When MESC was initially introduced, materials were allocated a unique 7-digit number.
Most species of wentletrap are white, and have a porcelain-like appearance. They are notable for their intricately geometric shell architecture, and the shells of the larger species are prized by collectors. The more or less turret-shaped shell consists of tightly-wound (sometimes loosely coiled), convex whorls, which create a high, conical spiral.
The Terebridae, commonly referred to as auger shells or auger snails, is a family of predatory marine gastropods in the superfamily Conoidea. [3] They have extremely high-spired shells with numerous whorls; their common name refers to the resemblance of their shells to rock-drill bits.
The shell is imperforate, small and relatively thin, with an ovate shape and a straightly conic spire. The body whorl is a very pale brown, lighter near the suture, featuring an opaque white band at the periphery and sparsely streaked with brown, transitioning to chestnut-brown behind the lip .
The Registry of World Record Size Shells is a conchological work listing the largest (and in some cases smallest) verified shell specimens of various marine molluscan taxa.A successor to the earlier World Size Records of Robert J. L. Wagner and R. Tucker Abbott, it has been published on a semi-regular basis since 1997, changing ownership and publisher a number of times.
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It held 20 × 25-shell cartons (500 total shells) of 12 gauge ammunition and weighed around 65 lbs (Dimensions: 15" Length × 10.375" Width × 9.75" Height; Volume: 0.88 Cubic Feet). Guard shells had either a brass base (base only) with a full paper hull or partial brass case (1" long) and a long paper hull.
The following species are also included in this genus by the Shell Catalogue: [11] Elaeocyma clavata (Sowerby, G.B. I, 1834) References External links ...