Lll?KAK T 



Iflatwoime an& flDceosoa. IRcmcrtmce. 



S:brea&*'W0im6 ant) Saoitta. IRotifcrs, 



Ipol^cbact Moima. Earthworme & OLcccbcs. 



(Bepb^rea ant) Ipborome. pol^soa/' 



IT is with no small degree of pleasure that we direct the 

 attention of our readers to Vol. II., according to the classi- 

 fied arrangement of subjects, of this very important work. 

 We have on former occasions had the privilege of writing notices 

 with short extracts from Vol. III. on " Mollusca and Brachio- 

 PODS, and from Vol. V. on " Peripatus," and the first section of 

 an exhaustive account of " Insects." In reviewing the volume 

 before us, we shall, with the publisher's permission, make a few 

 extracts, descriptive of some of the lowlier forms of Animal Life, 

 for the twofold purpose of inducing our readers to take a more 

 than general interest in these little-known forms, and to show how 

 very thoroughly the various subjects have been treated by their 

 authors, and how admirably the publishers have undertaken their 

 share in illustrating the volume. 



" The Platyhelminihes, or Flat Worms, form a natural assem- 

 blage of animals, the members of which, however widely they may 

 differ in appearance, habits, or life-history, exhibit a fundamental 

 similarity of organisation which justifies their separation from other 

 worms, and their union into a distinct philum. Excluding the 

 leeches {Hirudtnea) and the long sea- worms (Nemertinea) — which, 

 though formerly included, are now treated independently — the 

 Flatyhehninthes u\2iy be divided into three branches:—!. — Tur- 

 bellaria (including the Planarians) ; 2.— Trcmadoda (including the 

 liver-flukes); and 3. — Cestoda (tape-worms). 



The Turbellaria were so called by Ehrenberg (1831) on 

 account of the cilia or vibratile processes with which these aquatic 

 animals are covered, causing, by their incessant action, tiny 

 currents ("turbellae," disturbances) in the surrounding water. 



*"The Cambkidcje Natural History." Edited by S. F. Ilarmer, 

 M.A., Fellow of King's Coll., Cambridge, Superintendent of the University 

 Museum of Zoology; and A. E. Shipley, M.A., Fellow of Christ's Coll., 

 Cambridge, University Lecturer on the Morphology of Invertebrates. Vol. II., 

 pp. xii.— 560. (London : Macniillan and Co. 1896.) Price 17/- nett. 



