508 PROCEEDINGS OF THE SOCIETY. 



Mr. W. Wesche" gave a brief resume of his paper on " Undescribed 

 palpi on the mouth-parts of Diptera." Drawings in illustration of the 

 subject were shown upon the screen by the kindness of Mr. Poser. 

 Specimens, showing the palpi on several species, and in a more rudi- 

 mentary state in other species, were exhibited under Microscopes in the 

 room. 



The Chairman regretted that owing to the lateness of the hour Mr. 

 Wesche had been unable to read his paper in extenso, but the thanks of 

 the Society were due to him for bringing this new observation before 

 them, and his communication would no doubt be read with much interest 

 when it appeared in the Journal. 



Mr. Karop thought, that in addition to thanking the authors of the 

 several communications which had been brought before the Meeting, the 

 Fellows would desire to express their thanks to Mr. Poser for his most 

 effective manipulation of the instrument by which the illustrative figures 

 were thrown on the screen, and also to Mr. Pillischer for the loan of the 

 Microscopes under which Mr. Eousselet's rotifers were being exhibited. 



The thanks of the Society were voted to these gentlemen by 

 acclamation. 



Mr. Karop announced that the Eooms of the Society would be closed 

 on August 16th and reopened on September 15th, and that the next 

 Meeting of the Society would take place on Wednesday, October 15th. 



The following Instruments, Objects, &c, were exhibited : — 



Prof. Marcus Hartog : — Choanophrya (g.n.) infundibulifera on Cyclops 

 brevicornis (^ in. objective), showing funnel-bearing tentacles. Choano- 

 phrya infundibulifera (^ in. objective) on Cyclops, oblique section in situ. 



Mr. A. Hilger : — New Photo-measuring Micrometer. 



Mr. F. E. Ives: — Lantern slides of Pleurosigma angulatum, Surirella 

 gemma, and Coscinodiscus asteromphalus. 



Mr. C. F. Rousselet : — Synchseta tremula, S. triophthalma, and S. vorax 

 (alive), and mounted specimens of S. pectinata, S. tremula, S. oblonga, S. 

 grandis, S. slylata, S. longipes, S. hitina, S. tavina, S. liUoralis, S. baltica, 

 S. gyrina, S. triophthalma, S. monopus, S. cecilia, S. vorax, S.neapolitana, 

 also jaws of S. pectinata and eggs of S. stylata. 



Messrs. Wm. Watson and Sons : — New Two-speed Fine-adjustment. 

 Holder for Metallurgical Specimens. 



Mr. Walter Wesche : — Maxillary Palpi on proboscis of Eyetodesia 

 basalts $ ; Maxillary and Labial Palpi on the proboscis of Hydrotsea 

 occulta £ ; Fly, from which the proboscis, shown mounted, has been 

 cut (Hyetodesia perdita $ ). 



Messrs. Zeiss : — The Epidiascope. 



New Fellow. — The following was elected an Ordinary Fellow : 

 Mr. James Alexander Martin. 



