Metamorphosis is a crucial life-history event that can change an organism's form, function, behavior, and ecological interactions. In the Mollusca, several neurotransmitters and neuromodulators play inductive or inhibitory roles in the pathways that govern larval metamorphosis. Nitric oxide (NO) has been implicated in developmental processes in vertebrates and arthropods, but not previously in ...

as Surgeon-Naturalist for about four years. The volume is divided into three parts, the first for the general reader, describes the objects of marine survey of India, the world beneath the waves, and gives an account of many voyagings among the islands in the Bay of Bengal, and the Laccadive Sea. The second part deals with the deep-sea fauna of the Indian region, with deep sea fishes, crustacea...