432 Bibliograj)hicaI Notice. — Miscellaneous, 



otherwise excellent plan, which in the case of orchids, 

 Sarracenia, Nepenthes, Drosera, &c., is moreover beneficial 

 to the growth of the plants, is almost valueless as against the 

 species of Ltmax and Agriolimav, which are also to be met 

 with in glass-houses, since these slugs can also reach tiie 

 plants through the air. In this case the best defence will 

 still be found in diligently searching for and collecting the 

 animals, which must be done principally in the evening and 

 early in the morning. 



BIBLIOGRAPHICAL NOTICE. 

 Catalogue of the Collection of Birds' Eggs in the British Museum 

 (Natural HiMorg). Vol. IV". London : Printed by Order of the 

 Trustees of the British Museum. 1905. 



This volume, by Mr. Eugene W. Oates and Capt. Savile G.Reid, deala 

 with the eggs of the Families from the Timeliida? to the Certhiidae, 

 and includes descriptions of some G20 species. 



A feature of the book, as in the preceding volumes, is the great 

 beauty of the plates. The selection of specimens illu^tratiag the great 

 range of variation which some species exhiyjit is a step in the right 

 direction^ but we venture to think the usefulness of the Catalogue 

 would be immensely increased if a summary of the characteristic 

 features of the eggs of each family were given, as well as a short 

 account of the structural characters of the shell. 



Again, it would have been helpful had special reference been made 

 to the eggs of such species as are supposed to be peculiar to Great 

 Britain, but represented on the Continent by scarcely distinguishable 

 forms. In the case of the Long-tailed Tit (yE'githalus roseus), for 

 example, wo find on comparison of the descriptions of the eggs of this 

 bird and those of the Continental ^. caadatus that they are 

 distinguishable, while this is not the case with the eggs of our Coal- 

 Titmouse (Periparus hritaaniais) and the Continental P. ater. 

 Finally, whenever possible, the number of eggs in a clutch should 

 be definitely stated, yet this appears in no single instance to have 

 been done. 



MISCELLANEOUS. 



The Echinoderm Name Calveria hystrix. 



To the Editors of the ' Annals and Magazine of Natural History' 



Gentlemen, — In laboriously proving the identity of Korethrasier 

 Jiispidus with Calveria hystrix (Ann. & Mag. Nat. Hist., Feb. 1906, 

 p. 2.51) I was unconsciously treading in the footprints of a master. 

 This identity was, without comment, assumed by Loven in a 

 footnote on p. 31 of his ' Etudes sur les Echinoidees' (1875). 



Yours, with apologies, 

 British Museum (Nat. Ilist.), F. A. Bather. 



24th Feb., 1906. 



