140 ACCOUNTS, Etc., OF THfe BRTTlSH MUSEUM. 



now arranged in zoological sequence under the three orders : 

 Nautiloidea (table-cases 2 and 3, wall-cases 1 and 2 on the 

 west side, and 13 and 14 facing them, on the east), 

 Ammonoidea (table-cases 4-15, wall-cases 3-6 on the west, 

 9-12 on the east), Belemnoidea (table-case 16, wall-cases 

 7 and 8). Within each order the specimens are now grouped 

 under the chief geological periods in ascending sequence. 

 In the course of the work many minor improvements of 

 labelling and changes in the exhibited specimens have also 

 been introduced. 



The Conularida, or so-called Pteropods of Palaeozoic age, 

 have been removed from table-case 16, Gallery 7, and re- 

 arranged in table-case A7 at the north end of Gallery 8. 



A series of fossil shells showing colour-markings, has 

 been tableted and labelled for exhibition in wall-case 3, 

 Gallery 8. 



A piece of fossil wood from the London Clay, bored by 

 Teredo antenautce, has been mounted in a special case in the 

 middle of Gallery 8. 



Post-Pliocene Lamellibranchia and Gastropoda from the 

 Thames Valley, and Pliocene MoUusca from St. Erth, 

 Cornwall (Warburton Collection) ; various Tertiary Mollusca 

 from Turkey ; Cretaceous Mollusca from Brazil (Mawson 

 Collection) and Austria; Jurassic Mollusca from England 

 and France (Blake Collection), and various other recent 

 acquisitions have been registered, labelled, and incorporated 

 in the unexhibited collection. 



Number of specimens of Mollusca registered : Cephalopoda, 

 362 ; Gastropoda, 3,066 ; Lamellibranchia, 1,706. 



Arthropoda (Gallery 8 and Workroom). — The registration, 

 labelling, and arrangement of the unexhibited Crustacea 

 Decapoda has been completed, and all the incorporated 

 Arthropoda are now in order for scientific study. The 

 transference of the contents of the drawers is, however, still 

 in progress ; all the British Trilobites and the Cambrian and 

 Ordovician species among foreign Trilobites have been 

 removed to 129 drawers of the new cabinets in the 

 Workroom, to which the whole Arthropod collection will 

 ultimately be transferred. 



The following are the chief collections registered and 

 incorporated during the year : — A Laur, Senonian cirripedes 

 from Rligen ; R. S. Bassler, Palaeozoic Ostracoda from 

 N. America : W. Madeley, various Carboniferous species 

 from the ironstone of Staffordshire ; T. Warburton, Decapoda 

 from the Pliocene of St. Erth ; R. Hudson, various trilobites ; 

 and especially the Caroline Birley Collection, containing 

 arthropods from various British and foreign localities. 

 Specimens have also been added from the collections of 

 Col. C. C. Grant (Canadian trilobites), Dr. L. Szajnocha 

 (Silurian of Podolia and Galicia), J. Mawson (Brazil), the 

 late Prof. J. F. Blake, and H. Keeping (Shineton trilobites). 



