208 BIBLIOGEAPHY. 



will not be an excuse for spending an evening in pleasant and intel- 

 lectual chat, but will lead to actual work being done by tbe members, 

 individually and collectively. It is just in proportion to the amount 

 of work done that the Society ought to and will flom-ish, and while 

 feeling sincerely sorry that I have been able to say so little which has 

 been worth your attention, I shall also feel that my time and youi-s 

 have not been quite wasted if anyone should be urged by my remarks 

 to assist with gi'eater energy in promoting the work and weKare of the 

 Society. 



Mr. Deane remarked that the paper they had just heard was, in 

 his opinion, a most valuable one. With regard to the extinction of 

 plants, and the introduction of fresh ones, he might mention that 

 when he first came to Clapham, there were at least six varieties of 

 ferns to be found on the Common. There was now, he believed, only 

 one kind, all the rest having become extinct. He believed also that 

 the weed Anacharis, which now grew to profusion in the ponds on 

 Clapham Common, had been introduced within the last few years. 

 In a book which he had lately seen, it was remarked that many years 

 ago a gentleman at Wimbledon grew a number of beautiful tulips, of 

 which he was very proud. He believed that the wild tulip was now to 

 be found on parts of Wimbledon Common ; this would probably owe 

 its inti'oduction to the number of tulijjs kept by this gentleman, some 

 of which had doubtless gone wild and spread over the Common. 

 Mr. Deane concluded by moving a vote of thanks to Mr. Britten for 

 his valuable and interesting paper, which was unanimously accorded. 



Six members were balloted for, and duly elected, and the certifi- 

 cates of four new members were read by the Secretary. 



Excui'sions were announced, on July 29, to Barnet (for Totteridge), 

 and on August 12, to Thames Ditton. 



The meeting then resolved itself into a conversazione ; a paj)er 

 having been announced for the next meeting (on August 15, at half- 

 past 7 o'clock in the evening), by Dr. Hector Helsham, " On the 

 Employment of the Microscope in Analysis." 



BIBLIOGEAPHY. 



Die Aufzucht d. Eichenspinners [Antherea yama MaiJ. Prof. 

 Fred. Haberlandt. Wien. Gerolds Sohn, 



Untersuchungen ueber die Gehorschnecke dor Saugethierc, A. 

 von Winiwarter. Wien. Gerolds Sohn. 



Jenaische Zeitschi-ift fiir Medicin und Naturwissenschaft hrsg. v. 

 der medicinisch-naturwissenschaftl. Gesellschaft zu Jena. Leipzig. 

 Engelmann. 



Berichte des Naturwissenschaftlich - medizinischen Vereines in 

 Innsbruch. Innsbruch. Wagner. 



Beitrage zur Biologic der Pflanzen. Dr. Ferd Cohn, Breslau. 

 Kern's Verl. 



