28 AUGUST 1880, Page 21

Ponds and Ditches. By M. C. Cooke. (Society for Promoting

Christian Knowledge.)—This is one of- the beat of the "Natural History Rambles" series. It is popular, but, we are glad to add, also accurate. The illustrations are numerous and well drawn, and are large enough to be quite characteristic of the organisms they repre- sent, so that the recognition of microscopic forms becomes easy by the aid of these drawings. Flowering and flowerless plants, desmids, and diatoms, protozoa, polyzoa, hydras, and rotifers, with other more highly developed and larger animals, are described in Dr. Cooke's attractive little book.