Transform Boundaries The final type of boundary is one where the two plates slide against each other in a sideways motion. These boundaries between plates is referred to as transform boundaries.
The three regions of the body of the Mollusk are the head-foot, the visceral mass, and the mantle-shell.
By Laura Klappenbach. Mollusks (Mollusca) are a group of invertebrates that includes squid, octopuses, cuttlefish, nudibranchs, snails, slugs, limpets, sea hares, mussels, clams, oysters, scallops, as well as many less well-known animals.Scientists estimate that there are more than 100,000 species of mollusks alive today.nstead, textbooks often describe a hypothetical mollusk that exhibits the features common to many species. This hypothetical mollusk has a mantle, shell, foot and visceral mass. The mantle is a layer of tissue that covers the visceral mass and in many mollusks it contains glands which secrete a hard shell.