M. S. Laverack – författare

The marine zooplankton is one of the most fascinating and diverse assemblages of animals known to biologists. This is a new edition of the successful student's manual providing a photographic guide to representative forms of the major groups from medusae and comb jellies to larval fish and squid. In it, only live and active organisms have been photographed, giving a unique visual perspective. In this new edition, the taxonomy and morphology have been revised and brought up to date, so that combined with information on behaviour and development, this book creates a vivid and essential reference text for all those interested in marine zooplankton.

The Physiology of Earthworms focuses on the three species of earthworms — Liimbricus terrestris, Eisenta foetida, and Allolobophora longa. Other earthworms or oligochaetes such as the fresh-water species are briefly mentioned. The topics covered include the biochemical architecture; digestion and metabolism; calciferous glands; axial field; nitrogenous excretion; water relations; respiration; physiology of regeneration; neurosecretion; nervous system; and behavior of oligochaetes. This book is a good source of information for biology students and researchers conducting work on earthworms and its different species.