ACCOUNTS, &C., OF THE BRITISH MUSEUM. 



Maestricht. Numerous additions have also been made to Case 1, containing the remains 

 of Pterosauria ; those of the Lias, Stonesfield Slate, Purbeck, and Lithographic Stone of 

 Solenhofen being now represented either by original specimens or by casts. 



Room IV. In this room two additional window-recess cases have been introduced 

 and fitted up, to exhibit a series of polished sections of sponges in flint from the Sussex 

 coast, commonly known as " Choanites." Also a series of " Boring-sponges " ( Cliona), 

 and other Vermiform bodies, preserved in flint, probably casts of Annelide-tubes. The 

 Chalk, and Greensand Sponges exhibited in this Room have also been named and 

 labelled. 



Room V. Two window-recess cases added to this Room have been fltted up and 

 occupied with a fine series of Crinoidea from the Wenlock Limestone, the Devonian, 

 the Muschelkalk, Lias, and Bradford Clay. The wall- cases in this room devoted to the 

 exhibition of the Soliduiigula, and a part of the Pachydermata, have been entirely re- 

 arranged, and the specimens have been re-mounted. Numerous additions have been made 

 to the Mammalian series. 



Room VI. Four window-recess cases have been added to this room, which have been 

 devoted to the exhibition of a series of Palasozoic Crustaceans ; the Merostomata, not 

 heretofore adequately represented ; and also space has been obtained for the display of 

 additional specimens of Trilobites, of which many new species have lately been added to the 

 Collection. 



The objects contained in the rooms in the Basement-floor have undergone examina- 

 tion, and a large number of boxes have been cleared, the specimens cleaned and sorted, 

 and those of any value added to the Collection. The duplicate specimens have been 

 placed in drawers in the Basement-rooms, labelled, &c. 



The mason and carjjenter have been much occupied in developing, fixing, and preparing 

 the large Reptilian fossils from Maestricht, contained in the Van Breda Collection ; 

 which, although too large to be accommodated in the present gallery, are properly 

 developed, and mounted in glass-fronted frames so as to be jjreserved for future exhibi- 

 tion. 



The smaller objects so prepared are placed in the Wall and Table Cases, or with 

 similar objects, in the drawers beneath the Table Cases, ready for the purposes of refe- 

 rence and study whenever required. 



Specimens registered during the year : — 



Vertebrata : 



Mammalia - - 148 



Aves 10 



Reptilia 391 



Pisces _-.____ 266 



815 



Invertebrata : 



Articulata ------- 234 



Echinodermata ------ 636 



MoUusca ------- 2,134 



Polyzoa --.----- 87 



Zoophyta ------- 354 



Protozoa ------- 454 



3,899 

 Fossil Plants 75 



Total - - - - 4,789 



The number of Students who have visited the Department during the past year is 520. 



Geo. R. Waterhouse. 



Depaktment op Mineralogy. 



The specimens by which the Collection of Minerals has been increased during the year 

 1871 are 513 in number; these have been registered, numbers being attached to theoi, 

 and labels placed with them indicative of their localities ; and they have been incorporated 

 in the Collection. 



Of the portion of the General Collection reserved in drawers, 1,290 specimens have 



been under examination, their localities where the verification of these was possible being 



attached on labels to the specimens. 



Information 



