1886.] MR. COCKKRELI. ON PARMACKLLA VAI.ENCIENNESI. 137 



March 2, 1886. 

 Dr. St. George Mivart, F.R.S., Vice-President, in the Chair. 



The Secretary read the following report on the additions made to 

 the Society's Menagerie during the month of February 1886 : — 



The total number of registered additions to the Society's Mena- 

 gerie during the month of February was 79, of which 3 were by 

 birth, 40 by presentation, 14 by purchase, 1 by exchange, and 21 

 were received on deposit. The total number of departures during 

 the same period, by death and removals, was 99. 



Amongst the additions during the month attention may be called 

 to :— 



1 Five examples of a large Batrachian of the Ari2;entiue Republic, 

 there called " Escuerzo " {Ceratophrys ornata), presented by Dr. 

 Frederick C. Strutt, and received February 13th. 



2. A Mantled Buzzard {Leucopternis palliata) from Brazil, pur- 

 chased February 15th, being the first example of this fine bird of prey 

 received by the Society. 



Mr. John G. Millais, F.Z.S., exhibited an adult male specimen of 

 the Ivory Gull (Larus eburneus), which he had shot himself at Thurso, 

 Caithness, on December 30, 1885, during a severe snowstorm from 

 the north. The base of the bill to the end of the nostril in living 

 specimen was light blue, and the point of the same orange-yellow ; 

 feet black, and eye surrounded by a ring of orange ; the rest of the 

 plumage being entirely white. 



Mr. Millais also exhibited an immature specimen of the same 

 species killed at East Haven, Forfar, in January 1879. 



Mr. T. D. Cockerell exhibited a living specimen of a variety of 

 Parmacella valenciennesi, Webb and Van Beneden, collected by J. H. 

 Ponsonby, Esq., at Tangier, and made the following remarks : — The 

 specimen differs from the typical P. valenciennesiin that it is marked 

 with black, the original figure of the species being quite uniform. 

 It may possibly prove to be distinct, but until further details are 

 ascertained it is best classed merely as a variety of P. valenciennesi, 



A precisely similar form is found at Gibraltar, of which there are 

 details in the 'Journal of Couchology ' for January 1886. 



The following papers were read :— 

 Proc. Zool. Soc— 1886, No. X. 10 



