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 [...]
In this article we will discuss about the structure of Polynoe with the help of a diagram. 1. It is a marine, carnivorous & phosphorescent worm found buried under stones & pebbles. 2. Animals are bilaterally symmetrical,, triploblastic, metamerically segmented and coeiomate. 3. A distinct head is present and body comprises of 12-15 segments. 4. The head bears three [...]