In this article we will discuss about the structure of Terebella with the help of a diagram. 1. They are red coloured, marine and tubicolous worms found along European and American coasts buried in mud between sea rocks. 2. Body elongated and measures about 15 to 20 cm. in length and is broad in front and narrow behind. 3. Head [...]
In this article we will discuss about the structure of Cattle Leech (Hirudo) with the help of a diagram. 1. Commonly called Indian Cattle leech and is a fresh-water form. 2. Ectoparasite on catties and even on man. 3. Setae, prostomlum, appendages and distinct head are absent. 4. Only a well developed posterior sucker is present. The anterior sucker being [...]
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 [...]