256 CURRENT NOTICES AND MEMORANDA. 



Allied Sciences. To give an idea of the varied contents of this 

 catalogue, we notice books relating to the following special 

 branches of microscopical literature : — Algse, Bacteria, Desmids, 

 Diatoms, Entozoa, Foraminifera, Infusoria, Medical Microscopy, 

 Micro-Biology and Physiology, Micro-Botany, Micro-Chemistry, 

 Micro-Geology and Natural History, Micro-Photography, Optics, 

 Sanitary Investigations and Adulterations, Zoophytes, etc. 

 Book-buyers will do well to consult this catalogue. 



We are sorry to receive from our friend, Mr. E. Wade-Wilton 

 of Leeds, a letter, in which he informs us that he has been ill for 

 nearly eight months. We are, however, glad to find that by his 

 doctor's orders he is now endeavouring to regain health, and if 

 possible, new life, by kilHng salmon and trout in the lakes of 

 Westmoreland and Cumberland. We regret to learn that his 

 sight is somewhat impaired, and that in consequence he is unable 

 to accept any new subscribers for his series of living objects ; but 

 he hopes shortly to devote his time to the supply of such animal 

 and vegetable specimens as will be suitable for Biological Class 

 illustration, and as we believe him to be an experienced and 

 careful naturalist, we think that those who require such slides will 

 do well to write to him. 



The Annual Meeting and Dinner of the Members of the 

 Postal Microscopical Society will be held at the Holborn Res- 

 taurant, High Holborn, on Thursday, October nth, at half-past 

 six p.m. It is hoped that we shall have a good attendance. 



Exchange.— I offer Fossil Diatomacae from Franzenbad, 

 Bohemia, and Fossil Material from the Vienna basin, containing 

 Foraminifera {Amphisfegi?ta D'Orb), and shall be glad to receive 

 in exchange Zoophytes, Gorgonia and Sponge Spicules, Holo- 

 thurian Plates^ and Diatomaceous deposits from Nottingham, 

 Barbadoes, and Richmond, U.S.A. 



J. C. RiNNBOCK, 



14, Simmering, Vienna, Austria. 



Exchange. — I offer Fossil Sand from Saucat's tertiary deposits, 

 containing well-preserved Foraminifera, Shells, Corals, & Spicules 

 (any quantity), in exchange for good mounted slides. 



E. RODIER, 



61, Rue Mazarin, Bordeaux, France. 



Errata. — P. 27, line 10, for Arachnoidiscus read Chondrns ; 

 p. 120, Une 9; iox pu7'poides XQdid pcpoides. 



