In this article we will discuss about the structure of Chiton with the help of a diagram. 1. It is a marine animal of cosmopolitan distribution. 2. It is found attached to stones and rocks (coral reefs) between tide marks. 3. Body is elliptical and is convex on dorsal and flat on ventral surface. Shell is present on dorsal side [...]
In this article we will discuss about the structure of Dentallium with the help of a diagram. 1. It is commonly called "Tusk shell" and is a marine mollusc found buried in sand of deep seas. 2. Bilaterally symmetrical body is enclosed in a cylindrical curved, ridged and conical shell, which is open at both ends. 3. Foot is small [...]
In this article we will discuss about the structure of Apple Snail (Pila) with the help of a diagram. 1. It is commonly called "apple snail" and is found in fresh water ponds, pools and ditches in India and adjacent regions. 2. Shell is external and spirally coiled and is comprised of 6 whorls. 3. The axis around which coiling [...]