130 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



The total number of specimens acquired during the past 

 year has been as follows : — 



A. Vertebrata : 



By Donation ----- lOG 

 „ Purchase ----- 3,897 



Exchange ----- 74 



B. Invertebrata : 



By Donation ----- 2,081 



„ Purchase - - - - - 8,719 



„ Exchange ----- 98 



C. Plants : 



By Donation ----- 90 



,, Purchase ----- 146 



4,077 



10,898 



23C 



Total Acquisitions in 1891 - - 15,211 



Exchanges : 

 The following exchanges have been sanctioned by the 

 Trustees, namely : — 



1. With Professor H. A. Nicholson, Aberdeen University ; 

 seventeen duplicate Steeple- Ashton Corals for ten Brachio- 

 pods {Acrotreta Nicholsoni), new to the collection. 



2. With Mr. H. W. Burrows, fifty-three duplicate land and 

 freshwater Shells for twenty-eight remains of Vertebrata 

 (Cervus, Elephas, Rhinoceros. &c.) from Brick-earth, Essex. 



3. With Professor 0. C. Marsh, Yale College, New Haven, 

 U.S. ; casts of teeth of Belodon, pelvic bones of Ornithop- 

 sis, and two bones of Pterodactyle, in exchange for Bron- 

 tops and other casts from America presented to the Trustees 

 by Professor Marsh. 



4. With Mr. W. Atkinson; a duplicate of Apiocrinus for a 

 new Echinoid {Ennalaster, sp. nov.) from the Lower Green- 

 sand, Nutfield, Sussex. 



5. With Dr. Otto Jaekel, Berlin Museum ; two duplicate 

 Crinoids and one cast of I chthyocrinus pyriforinis for one 

 Encrinus Carnalli, one Dadoci^inus Kunischi, and one 

 Extracrinus. 



6. With Professor Dr. G.Lindstrom, Museum, Stockholm; six 

 small Silurian 'BvsichioY>ods,hemg dtiplicates, for one specimen 

 of Gissocrinus, sp. nov., wanted for the collection. 



7. With Professor A. Gaudry, Museum Natural History, Paris ; 

 fourteen separate casts (prepared by Mason-formatore on the 



premises) 



