SCIENCE-GOSSIP. 



105 



the introduction will be found most useful to the 

 beginner and quite trustworthy. We believe this 

 new edition of Mr. Adams' work will prove a great 

 incentive to people to take up the study of our 

 land and freshwater shells. No more interesting 

 or handy group can be found for a British natura- 

 hst to investigate, as there are only about 127 

 species to overcome, with their varieties. This is 

 rendered easy by aid of this manual, which will 

 lead the student on to works of greater pretentions. 



knowledge in its information, and will long remain 

 a book for handy reference on all zoological 

 questions. We understand that the publishers 

 have arranged to re-issue it in sixpenny parts. 

 This new issue by no mean injures the value of the 

 first edition, being practically the same, only that 

 the parts are half the size of those at one shilling, 

 and contain one coloured plate instead of two in 

 each. Advantage has been taken of the new issue 

 to correct several points in the letterpress and 



Development of a Sea-Urchin : Full-grown Larva. 

 (From Warne's "Royal Natural History.") 



The Royal Natural History. Edited by Richard 

 Lydekker, B.A., F.R.S. Illustrated by 72 

 coloured plates and 1,600 engravings. (London 

 and New York : Frederick Warne and Co.) Pub- 

 lished in IS. parts. 



This work has reached Part 34, which is the last 

 but one of the finest general work on natural 

 history published in our language. It has main- 

 tained its high standard throughout, the articles 

 having been written by recognized experts in their 

 several subjects. It is thus fully up to modern 



illustrations, so that it will be really a new edition 

 as well as a new series. No matter how much 

 inclined a young naturalist may feel to specialise 

 his studies and conline himself to one subject, he 

 ought to get this work to find out how one group 

 of animals is related to and dependent upon the 

 others. Part 34 is devoted to a portion of the 

 Starfish and Mollusca. We show an illustration 

 from the article on " Development of Sea-Urchins," 

 and also one of a tarantula spider from another 

 part of "The Royal Natural History." 



