10 



Dr. P. Chalmers Mitchell, F.R.S., F.Z.S,, Secretary of the 

 Society, exhibited a lantern-slide made from a photograph of a 

 domesfcic Donkey [Equus asinus) taken by Captain C. H. Armitage 

 in the Gold Coast, and showing a very remarkable pattern of 

 transversely arranged black stripes on the flank. 



Dr. F. E. Beddard, M.A., F.R.S., F.Z.S., Prosector to the 

 Society, read a paper on the Anatomy and Systematic Arrange- 

 ment of the Cestoidea, in which he described a new genus of 

 Tapewor'ms, of the family IchthyotEeuiidse, from the Crossed 

 Viper [Lachesis alternans). 



Dr. W. A. CuNNiNGTON, M.A., F.Z.S. , read a paper on the 

 Branchiur-a collected by the Third Tanganyika Expedition in 

 1904-1905. The collection contained over 300 specimens, and 

 proved that in the case of this group of animals also, Lake 

 Tanganyika exhibits a number of endemic forms. While two 

 species of Argulidse are known to be widely distributed in the 

 lakes of Africa, they are associated in Nyasa with a single foi'm 

 peculiar to that lake, but in Tanganyika with no less than seven 

 new types. Tanganyika is thus shown to possess not only a con- 

 siderable number of characteristic species, but a much richer 

 Branchiuran fauna than the other great African lakes. The 

 paper was illustrated by lantern-slides made from photomicro- 

 graphs of the new species. 



Mr, William Schaus, P,Z,S,, communicated a paper containing 

 the descriptions of a large number of new species of Rhopalocera 

 from Costa Rica. Over 1000 species had been collected, and of 

 these 54 Avere found to be new. 



A paper was received from Dr, Arthur Willey, M.A., F.R.S., 

 F.Z.S,, containing some notes on Plankton collected across the 

 mouth of the St, Croix River, opposite to the Biological Station 

 at St, Andrews, New Brunswick, in July and August 1912. 



