436 



enumeration and brief description of a large number, and this 

 course we consider highly preferable in a work of this description. 

 Sponges naturally occupy a comparatively small proportion of 

 the volume — 78 pages, with 61 figures. The subject, however, is 

 treated with thoroughness and efficiency, and forms an excellent 

 introduction to this somewhat neglected branch of marine zoology. 

 Ooelenterata and Ctenophora occupy 180 pages, with 61 figures ; 

 and the Echinodermata, forming by far the largest section, 

 complete the volume. The whole work is thoroughly scientific 

 and up-to-date. Anatomical and morphological characteristics 

 have received careful and generous treatment, and each section 

 forms a most reliable textbook of the subject upon which it 

 treats. The illustrations are not, as a rule, elaborate, but are 

 uniformly good, and serve their purpose admirably. They are 

 almost entirely gleaned from other works, but the selection shows 

 great care and discrimination. F. P. S. 



Journ. Quekett Microscopical Club, Ser. 2, Vol. IX., No. 59, November 1906. 



