ACCOUNTS, &C., OF THE BRITISH MUSKUM. 



Wall-cases 1, 2, and 3, and eiglit Table-cases, namely, 25-32, containing the Pla;>io- 

 stomata, and the Holocephala ; and comprising the families of the * Carcha?-id(B, the 

 Lomnidce, the JVotidanidce, the Hybodojitidce, tlie Cestracioidida, the Raiida, and the 

 Eduphodontida;, have been fully arranged, and the specimens mounted on tablets, Avith 

 their names, formations, a7id localities added to each, all the figured " types " being 

 indicated by a green label. 



The number of specimens labelled and mounted on tablets is 8,146 ; the number of 

 large specimens framed for Wall-cases is 206; the number mounted upon stands is 112 ; 

 total, 8,464. The fossil Fish-remains m the other Wall and Table-cases are all gi-ouped 

 ready for mounting and labelling, and a very considerable proportion of the larger 

 specimens for the Wall-cases have been developed, framed or mounted for exhibition. 



Wall-cases 1, 2, and 3 nre entirely devoted to the Plagiostomata, and comprise a 

 large series of "Ichthyodorulites," followed hj Hybodontldce and Cestraciontidm, includino- 

 spines of Gyracanthus and Ctcnacanthus, from the Coal-measures ; Oracanthus, &c., from 

 the Carboniferous Limestone. To these succeed a fine series of remains of heads, with 

 teeth, spines, and shagreen of Hybodus and Acrodus, from the Lias of Lyme Regis, &.c. 



Wall-case 3 is devoted to the Selachians, and to the Rays ; tlie most noteworthy of 

 which are the new and undescribed species of" Sharks and Rays, from the Cretaceous of 

 the Lebanon, and specimens of RhinobalUs maronita, from the same locality. 



This case also contains several specimens of the singular Squaloraia ijolyspondyla, from 

 the Lias of Lyme Regis, and of Sputhubatis buye^iacus (ThioUiere), irom the Kim- 

 meridgian of Cirin, near Lyons, &c. 



In Wall-cases 4 and 5 follow the Acanthodians, as Cheiracanthus, from the Devonian 

 of Tynet Burn, and also from the Carboniferous series of Eskdale. To these succeed 

 the Placoderms and Cephalaspidas {Pterichthys, Coccosteus, Asterolepis, and But/iriolepis, 

 frona the Scottish Devonian, and from Shropshire). 



In Wall-case 6 follows the order Ganoidei, embracing the Holoptychidae and the 

 Saurodipteridai. 



"Vt^all-case 7 contains the Ccelacnnt/udce, represented by the genera Rhizodiis, Ccela- 

 cantlais, Gyrosteus, and Macropmna. 



Wall-case 8 contains the Acipenseridaj (the Sturgeons), represented by Chondrosteus, 

 from the Lias; the Palajoniscida;, including Cheirolepis, Pyyopttrus, and Acrolepis; this 

 family is continued in Wall-case 9, in which the Platysomidse are also placed, represented 

 by the genus Platysomus. 



Wall-cases 10-13 comprise all the genera included in the great group or sub-order of 

 Lepidosteoidei (fishes with rhomboidal scales), represented by Lepidotus, Dapedius, 

 Tetragonolepis, Heterolepidotus, Pholldopleurit.s, ^ernioiK.tus, Aspidorliyncluis, &c. 



In Wall-cases 14 and 15 ai-e placed the fossil fishes of the sub-order Amioidei, repre- 

 sented by Calurus, Pachycorrmis, I.eptolepis, Thrissops, &c. 



Wall-case 16 contains the Teleostei (fishes with a well-developed bony skeleton), as 

 the EaocidcK (Pikes), the Clupeidce (Herrings^, including tlie genera jEsox, Ciapea, 

 Osmeroidex, SvK^rdis, Perca, &c. 



Wall-cases 17 and 18 contain the Ci-etaceous Bey rid da:, and the Eocene Pulao- 

 rliyncdiidcB, the former represented by Beryx from the Chalk, and Anenclielum from the 

 Canton Glarus Tertiaries. Concluding in Case 18 with the FistuluridcB (the Pipe-fishes), 

 and the Scombridce (Mackerel). 



The Table -cases follow the same arrangement as is observable in the Wall-cases, 

 varied only by the size and number of the specimens by which each family is repre- 

 sented. 



Invertebrata. 



Cephalopoda. — NARROW" Gallery, No. 2. — This Gallery was originally arranged 

 with 16 Table-cases only, to contain the Cephalopoda, &c., but early in the past year 

 (1883) Her Majesty's Office of Works provided it with Wall-cases, for the reception and 

 exhibition of the shells of the larger extinct forms belonging to this class, the Ammonitidfe, 

 Orthoceratidfe, &c. 



The fitting up of this Gallery with Wall-cases necessitated the temporary removal cf 

 the whole of the 16 Table-cases, with their contents, into Gallery B. and elsewhere. 

 They have now been all replaced, the whole series of fossil Cephalopoda re-arranged, 

 iind the large specimens (not heretofore exhibited) arranged in regular series in the new 

 Wall-cases. 



Around the upper part of the Wall-cases 82 enlarged figures of Cephalopoda mostly 

 drawn and coloured from actual specimens) have been placed, illustrating the leading 

 forms in this great division of the MoUusca so largely represented in the Secondary and 

 Palaeozoic Rocks. 



The detailed work of naming, mounting, and labelling the Cephaloisoda is still in 

 progress. 



* Sharks, Rays, and Chimseras. 



