520 Rejjorts and Proceedings — 



single graptolite had been detected in the Upper Ludlow rocks, 

 althongh two species, M. colonus and M. priodon, had been stated to 

 be of common occurrence in both the Lower and Upper Ludlow. 

 The graptolites, with the exception of a species or two of the 

 Dendroidea, appeared to have died out for ever in the Aymestry 

 Limestone, in which a few indeterminable fragments only had been 

 found. 



Of the true graptolites, or Ehabdophora, but a single genus, 

 Monograptns, occurs ; and only one genus of the grai^tolite allies, 

 Ptilograptus, is undoubtedly present. The species are as follows : 



Monograptns Bohemicus, Barr. 



cupula, sp. nov. 



chimaera, Barr. 



clavicula, sp. nov. 



colonus, Barr. 



iiicurvus, sp. nov, 



Leintwardensis, sp. nov. 



MonograpUis Nilssoni, Barr. 



Salweyi, sp. nov. 



se7-ra, sp. nov. 



Ptilograptus Anglicus, Nich. 



elegans, sp. nov. 



[vel Dendrograptus) Nichol- 



soni, sp. nov. 



These species were found to be restricted in their range in time, 

 and to characterize the same zones at distances wide apart. Some 

 j)rogress had been made towards working out this interesting 

 question ; but the author considered a more lengthened investigation 

 of the Lower Ludlow rocks in the Ludlow area to be necessary before 

 any definite conclusions could be arrived at. 



IV. — Seventh Report of the Committee appointed for the 



PURPOSE OF CONTINUING EeSEARCHES IN FoSSIL CrTJSTACBA 



CONSISTING OF Prop. P. Martin Duncan, M.B., LOND., F.E.S. ; 

 Henry Woodward, F.R.S. ; and Eobert Etheridge, F.E.S. 

 Drawn up by Henry "Woodward, F.E.S. 



LAST year, at the Brighton Meeting, I was enabled to lay before 

 this Section a very considerable list of accessions to Fossil 

 Crustacea, and also a goodly account of work performed. A very 

 ruitful season is not unfrequently succeeded by a smaller harvest. 

 Such is the case with my Eeport this year. I am, however, able to 

 show some favourable results. 



Part V. of my Monograph on the Mbrostomata, containing the 

 Sub -Order Xiphostjra, will be ready for publication before the 

 end of the present year. I have included in it the following genera 

 and species, namely : — 



Bellinurus Konigianus, H. Woodw. Coal M., Dudley. 



belhilus, Konig. „ Coalbrookdale. 



regince, Baily. „ Queen's Co., Ireland. 



arcuatus, Baily. ,, „ 



Prestwiehia Birtwelli, sp. nov., H. Woodw. „ Lancashire. 



anthrax, H. "Woodw., 1866. ,, Coalbrookdale. 



rotundata, H. "Woodw. „ „ 



Neolimulus falcatus, H. "Woodw. IT. Silurian, Lanarkshire. 



I have also introduced into this Part of my Monograph those 

 singular forms which occur in the Carboniferous Limestone at 

 Cork, in Ireland ; at Settle and Bolland, in Yorkshire ; and at 

 Vise, Belgium ; referred to the genus Cyclus, namely : — 



