DEPARTMENT OF GEOLOGY. 139 



The total number of specimens acquired during the past 

 year have been as follows : — 



A. Vertebrata : 

 By Donation - - - - 

 „ Purchase - - - - 



Exchange 



B. Invertebrata 

 By Donation - 



,, Purchase 

 „ Exchange - 



C. Plants : 

 By Donation - 



„ Purchase 



2,320 



4,505 



232 



Total - - - 7,057 



Exchanges : — 



An exchange has been sanctioned with Dr. F. Frcck, of the 

 Halle University, of two duplicate specimens of Stoliczkaria 

 granulata, for three specimens of Heterastridiuon congloha- 

 tum, from the U. Trias of Austria, new to the collection. 



An exchange with Dr. Jaekel, Berlin University, of some 

 duplicate fish bones and teeth for two Crinoids, new to the 

 collection ; also three duplicate Crinoids for five specimens of 

 Phyllocrinus from the Neocomian of Stramberg, not repre- 

 sented in the collection. 



An exchange with Mr. W. R. Billings, of eight duplicate 

 Cystidea for 15 Silurian Crinoids, from America, new to the 

 collection. 



Lectures and Demonstrations. 



Swiney Lectures on Geology : — 



A course of twelve lectures on " the Microscope in 

 Geology," by Professor Henry Alleyne Nicholson, M.D., D.sc, 

 F.G.S., etc., Regius Professor of Natural History in the Uni- 

 versity of Aberdeen, was delivered in the Natural History 

 Museum, commencing on the 6th of October, and ending on 

 the 31st of that month ; they were attended by 1,889 persons, 

 or on an average by 1572 persons for each lecture. 



Mr. F. A. Bather gave an address to the members of the 

 Geologists Association, on 12th April, on Crinoids, and was 

 followed on the same afternoon by Mr. J. W. Gregory, on the 

 Echinoids. Forty-five members were present. 



Professor P. Martin Duncan, f.r.s., gave demonstrations to 

 his class of students from King's College on April 29th 

 May 13th, and 20th. 



0,81. Dr, 



