REVIEWS. 141 



Parasites of Pycnogonum are really the young, as suspected 

 by Mr. Nicholson. F. B. K.'s notes and sketches, with reference 

 to G. Hodges' paper in the Intellectual Observer^ require little 

 further observation than to say that G. H.'s original paper on the 

 singular mode of development will be found in the " Transactions 

 of the Tyneside Naturalists' Field Club," Vol. 5, Part II, p. 124. 

 It would appear from this that the young, having arrived at the 

 stage so well shown by A. Nicholson, free themselves from the 

 parent, and are carried by the waves into rock-pools, inhabited by 

 a species of Coryne, one of the Sertularian Zoophytes. By one 

 of these Zoophytes a young Pycnogon is swallowed (the species 

 observed was Phoxichilidium coccineum\ and passes, or is passed, 

 on to the end of a growing branch. Here a sack is formed, in 

 which it stays as a gall insect in its artificial excrescence, growing 

 rapidly on the store of nutriment constantly furnished by its 

 foster-parent. Having attained, after two or three moults, to a 

 condition in which it is able to set up in the world on its own 

 account, it breaks out from the walls of its temporary home by 

 means of its strong foot-jaws, and sprawls away in search of food 

 and shelter, in due time to reproduce its kind. 



The New English Dictionary. Edited by James A. H. 



Murray, LL D., etc. (London : H. Frowde, Clarendon Press.) 



A fifth part of this noble and invaluable work is before us. The diction- 

 ary embraces all words in the English language, which are in use now, or have 

 been used during the last 900 years, and the present part reaches from Cast to 

 Clivy. This part alone contains 5,966 main words, 1,031 combinations with 

 separate explanations, and 1,374 subordinate words, making a total of 8,371 

 words. In the entire course of the five parts now published, no fewer than 

 45,391 words have been treated. Truly, this is a great work. 



A Contribution to the Flora of Derbyshire. By the 



Rev. W. n. Painter. 8vo, pp. 156. (London: George Bell and Sons. 

 Derby: E. Clulow, jun. 18S9.) Price 7s. 6d. 



A very full account is here given of the Flowering Plants, Ferns, and Cha- 

 race?e found in the county. The descriptions are systematically arranged. In 

 the introduction a short account of the Geolog}' of Derbyshire is given, and its 

 relation to the Flora of the county is pointed out. There is also a well- 

 engraved map of the county. 



Index of British Plants accordinsf to the London Cata- 

 logue. By Robert Turnbull. 8vo, pp. 98. (London : George Bell and 

 Sons. 1889.) Price 3s. 



The purpose of this book is to flirnish a complete Index of British Flower- 

 ing Plants and Ferns. It is based upon the eighth edition of the London 

 Catalogue, and contains all the names there found, together with all the addi- 

 tional names of species, under which descriptions are given in most of the best- 

 known English botanical works. We think it will be found very useful to 

 the botanist. 



