644 ON SNARE-BUILDING CADDIS WORMS. 



interest, as it was the first instance known of pyorrhoea alveolaris 

 in a Gorilla, Habitat Mikeno Yolcano, Kivu District. 



Mr. D. Seth-Smith, F.Z.S., exhibited a series of skins and 

 photographs of some polyandrous Birds, and described their 

 mating habits. 



Dr. Ohas. F. Sonntag, F.Z.S., exhibited and made remarks 

 upon, some abnormalities in the Carnivora, 



Mr, L. T, HoGBEN, F.Z.S., and Mr, E. A. Spaul exhibited, 

 and made remarks upon, the eifect of Pineal Gland administra- 

 tion on the pigment-cells of Frog Tadpoles. 



May 24tb, 1921. 



Prof. E. W. MaoBride, D.Sc, F,R.S., Vice-President, 

 in the Chair. 



The Secretary read the following Report on the Additions 

 to the Society's Menagerie during the month of April ; — 



The registered additions to the Society's Menagerie during 

 the month of April were 198 in number. Of these 81 were 

 acquired by presentation, 27 were deposited, 84 were purchased, 

 and 6 were born in the Menagerie. 



The following may be specially mentioned : — 



A pair of Lion Cubs (Felis leo), from Somaliland, presented by 

 Sir Geofirey Archer, K.O.M.G., on Api'il 21st. 



2 Sloth-Bear Cubs {Melnrsus ursinus), from the Central Pro- 

 vinces of India, presented by Capt. R. C, Ansdell on April 5th. 



2 King Vultures {Gypagus papa), from Tropical America, 

 purchased on April 6th, 



2 Spot-billed Toucanets [Selenidera maculirostris), from Brazil, 

 purchased on April 28th. 



A collection of Tropical Fish, including sevei'al species new to 

 the Collection, j)urchased on April 6th. 



Miss L. E, Cheesman, F.E.S., exhibited, and made remarks 

 upon, a series of lantern-slides illustrating the habiis, in the 

 larval stage, of the Hydropsychidse (Snare-building Caddis 

 Worms). 



