643 



Eine ausführlichere Darlegung meiner Untersuchungen über die 

 Entwickelungsgeschichte der Ausführungsgänge bei verschiedenen 

 Ordnungen der Insecten wird später mit Abbildungen veröffentlicht 

 werden. 



III. Mittheilungen aus Museen, Instituten etc. 



1. Linnean Society of London. 



November 2nd 1882. — Mr. A. P. W. Tho mas drew attention to a 

 series of specimens under the microscope and diagrams illustrative of the 

 Life-history of the Liver Fluke [Fasciola hepalica] . His experiments show 

 that the embryos of the Fluke as free Cercariae burrow into and develop 

 within the body of Limnaeus truncatulus and thereafter pass with the herbage 

 into the stomach and ultimately liver of the sheep. Salt added to the sheep's 

 diet is found to act as a prophylactic. — Mr.F. Crisp exhibited specimens 

 sent by Drs. Loew and Bokormy of Munich illustrating the discovery they 

 claim to have made of a specific chemical difference between living and dead 

 protoplasm, viz., the power of the living organism to reduce silver salts in 

 a very dilute akaline solution. Thus for instance living Spirogyra placed in 

 the solution reduces the silver salt and converts the contents of the cell into 

 a black opaque mass while, if first killed, no such action takes place but the 

 spiral arrangement of the chlorophyll threads remains perfectly distinct. — 

 Prof. E. Ray Lankester exhibited and made remarks on a fine series of 

 marine objects dredged by him last summer in the Fjords of Norway, the 

 Corals and Sponges being particularly interesting. — Dr. F. Day showed 

 examples of Trout, viz. of the American Brook Trout reared in an aquarium, 

 another reared at Howietoun, near Stirling, and a hybrid between the Ame- 

 rican and common Trout, all in illustration of his paper on Variations in form 

 and hybridism in Salmo fontinalis. — Sir J. Lubbock then read his tenth 

 communication on the Habits of Ants, Bees, and Wasps. Two queen 

 Ants have lived with him since 1874, therefore are 8 years old and they 

 laid eggs last summer. His oldest workers are 7 years old. Dr. Hermann 

 Müllers objections to the author's experiments on the colour sense of Bees 

 had been anticipated. The preference of Bees for blue is strongly indicated 

 by Müller's own observations on flowers. Sir John also now records further 

 experiments with reference to the power of hearing. Some bees were trained 

 to come to honey which was placed on a musical box on the lawn close to a 

 window. The musical box was kept going for several hours a day for a 

 fortnight. It was then brought into the house and placed out of sight, but 

 at the open window, and only about seven yards from where it had been be- 

 fore. The Bees, however, did not find the honey, though when it was once 

 shown them they came to it readily enough. Other experiments with a mi- 

 crophone were without results. Bees are popularly, and have been ever 

 since the time of Aristotle, supposed to be influenced by clanging kettles, etc. 

 Experienced apiarists are now disposed to doubt whether the noise has really 

 any eâ"ect, but Sir John suggests it as possible that the bees hear only the 

 higher overtones at the verge of, or beyond the range of human hearing. He 

 timed a bee and a wasp, for each of which he provided a store of honey and 



