98 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



identifying and marking the types of the Hewitson Collection ; 

 the arrangement of the tribes Noctuites and Geortietrites has 

 been proceeded with, a manuscript list of the latter being 

 prepared at the same time. 



(8.) Diptera. The assistant to whom this Order has been 

 assigned has commenced his work with a preliminary study 

 of the general arrangement of the Order ; he has proceeded 

 to form a new series of British Diptera, completing several 

 families; and, finally, studied and labelled Walkerian types of 

 Syrphidce, preparatory to an arrangement of this family. 



(9.) The Orthoptera of the families Forficulidce, Gryllidce, 

 and part of the PhasgonuridcB have been re-arranged, and 

 working catalogues of them prepared ; the Mantidce have also 

 been revised by comparison with Professor Westwood's 

 recently published catalogue ; and the examination of the 

 large collection of Ceylonese Rhynchota presented by Mr. 

 E. E. Green has been commenced. 



(10.) All the additions to the collections of Vermes and Echi- 

 noderms have been named and placed, and the manuscript 

 list of the latter has been kept up to date. The revision of 

 the Echinoderms inhabiting the British coasts, undertaken 

 with the view of preparing a catalogue of them, has made 

 some progress. 



(11.) Numerous additions to the Polyzoa, Sponges and 

 Hydrozoa have been determined and incorporated, and a 

 part of the exhibit^ series of Sponges has been re-arranged 

 and named. 



In connection with this work of arrangement, mention has 

 to be made, that the large collection of " Challenger " dupli- 

 cates, which contained specimens of all forms of marine 

 animals, has been sorted, and that of each group detailed 

 working lists have been prepared. 



II. — Registration. 

 The specimens obtained during the year, whether by pur- 

 chase or presentation, have been entered in the manuscript 

 registers of accessions, and the register numbers attached to 

 them. Foi- future reference the date and mode of acquisi- 

 tion, the exact locality where the specimens were obtained, 

 the name of the collector and any other particulars of interest 

 respecting them, are entered. Time did not permit of such 

 individual registration of the specimens of the collection 

 of Central American Coleoptera, and of the Keyserling 

 Arachnida. 



III. — Conservation. 



As in previous years the usual work of conservation has 

 been continued by dusting and cleaning, in rotation, the 



exhibited 



