70 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



more than ever urgent that some steps should be taken to relieve the 

 congestion in the Spirit Building. A considerable amount of time 

 has been given to the determination o£ the larval and post-larval 

 fishes of the " Terra Nova " Collection, and a report on them has 

 been prepared. 



TUNICATA. 



The specimens collected by the " Terra Nova " have been put in 

 order, and arrangements have been made for having them investi- 

 gated. 



MOLLUSCA. 



The roof of the Shell Gallery was repainted during the spring. 



In the exhibited series additions have been made to the Sikes 

 Collection of British Land and Freshwater Shells, mainly from 

 further series presented by Mr. Sikes. Mr. G. K. Gude has con- 

 tinued the renaming and re-arrangement of the Helicidse. The 

 specimens representing several groups (e.g. the Sepiidse, Eglisia^ 

 Mesalia and 2\irritelopsis) have been re-arranged and relabelled, 

 and an account of the latter genera published. 



A considerable number of the jars and bottles containing spirit 

 specimens have been refilled. 



The study of the shells of the Prosobranchia, Scaphopoda, and 

 Lamellibranchia obtained by the British Antarctic (" Terra Nova ") 

 Expedition has been completed and the Report published. 



The Nudibranchia and Cephalopoda obtained by the same 

 expedition have been investigated and reports on the collections are 

 being prepared. The Reports upon the Lamellibranchia (anatomy) 

 and Gastropoda Streptoneura (anatomy) commenced in 1914 have 

 been temporarily stopped. 



Several collections have been worked out and reported upon, 

 e.g. from Borneo, the Philippines, E. Africa and the Sudan. The 

 extension of the range of the American Slipper Limpet (Crepidvla 

 fornicata) in English coastal waters has been further studied and a 

 paper published upon its extension up the East Coast. A Gastropod 

 commensal with a Crinoid and exhibiting remarkable pigmentation 

 has been examined and reported upon. A selection has been made 

 and specimens mounted from a large series of Buliminus and 

 Petrceiis presented by J. H. Ponsonby, Esq. During the year 

 seventy-four microscopical preparations illustrating Molluscan 

 anatomy have been made and added to the collection. These are 

 mainly representative of Antarctic Nudibranchia. Mr. W. Denison 

 Roebuck having kindly volunteered to furnish the Museum with 

 examples of new or rare varieties of British Slugs, experiments 

 have been made with a view to securing a satisfactory preservation 

 of the colour and shape of these animals. 



Lieut.-Col. H. H. Godwin-Austen, F.R.S., has continued the 

 preparation and arrangement of the Blanford and Godwin-Austen 

 collections of Indian land and freshwater Mollusca. 



