DEPARTMENT OF GEOLOGY. 201 



(W. Mantell coll.) ; plaster casts of important specimens have 

 also been added. 



Considerable progress has been made with the mounting of 

 the amber inclusa in glass cells, and experiments are now being 

 undertaken to overcome difficulties met with in similarly 

 mounting the gum-copal inclusa. 



The exhibited series of Balani from the British Crag has 

 been revised and provided with new printed labels. The 

 whole of the exhibited series of Cirripedia from Foreign 

 Mesozoic rocks has been removed from the wall-case and 

 incorporated with the collection in the drawers, its place being- 

 taken by a specially-selected series of the more instructive 

 specimens newly labelled. 



A few additions have been made to the exhibited series of 

 Trilobita and Arachnida. 



The slip-catalogue of exhibited specimens has been con- 

 tinued. 



Number of specimens of Arthropoda registered, 775. 



Echino derma (Gallery 8). — The acquisitions registered, 

 labelled, and incorporated during the year include : — Echinoidea 

 from the Lower Carboniferous rocks of Ireland (Joseph Wright 

 coll.), the Upper Carboniferous of Staffordshire (J. Ward coll.), 

 the Mesozoic of France (Valabregue and Lissajous colls.), the 

 Cretaceous of England (Treacher and Mbckler colls.), the 

 Senonian of Ireland (Joseph Wright and Donaldson colls.), 

 of Westphalia (Bather coll.), of Tunis (Spath coll.), and of 

 Algeria (Edgar coll.) ; the Tertiary of Malta (Hitchins coll.), 

 of France (Valabregue coll.), and of Egypt (G. W. Murray coll.) ; 

 Asteroidea from the Cretaceous rocks of England (Mockler, 

 Bather, and Faber colls.), of Westphalia (Bather coll.), of 

 Riigen (Laur coll.), of Charente (Welsch coll.), and of Egypt 

 (electrotypes of R. Fourtau's type-specimens) ; Ophiuroidea 

 from the Carboniferous rocks of Ireland (Joseph Wright coll.) 

 and the Bathonian of Ardeche (Lissajous coll.); Crinoidea 

 from the Palaeozoic rocks of various foreign localities (Krantz), 

 the Ordovician of Ohio (Dyche coll.), the Silurian of Shrop- 

 shire (Bather coll.) and of Gotland (Jas. Wright coll.), the 

 Devonian of the Eifel (Hopmann coll.), the Carboniferous of 

 England (D. M. S. Watson and Spencer Perceval colls.) and of 

 Ireland (Joseph Wright and A. S. Woodward colls.), the 

 Callovian of Ardeche and Neocomian of Isere (Lissajous coll.), 

 the Cretaceous of England (Mockler, Withers, and J. P. 

 Johnson colls.), and of Tunis (Spath coll.); Blastoidea from 

 the Carboniferous rocks of Yorkshire (D. M. S. Watson coll.) 

 and of Ireland (Joseph Wright coll.) ; Cystidea, comprising 

 Edrioasteroidea, from the Ordovician of Shropshire (Bather 

 coll.) and of the United States (Krantz and Crane colls.), as 

 well as a number of reproductions, mostly made in the 

 Department, of historical specimens. 



