1871.] WOOBWABD ETJEYPTERTJ8 BEODIEI. 261 



red and blue marls and greenish shales (No. 12) at the Ledbury 

 tunnel, described by my friend the Eev. "W. S. Symonds*, who 

 remarks that " nowhere else could be seen such a view of the 

 * passage-beds' between the Silurian and Old Eed systems ;" but, 

 though at no great distance, they are apparently much less de- 

 veloped along the "Woolhope border. I visited this fine section 

 when the tunnel was being made, with several members of the 

 Warwickshire Naturalists' Field Club, and I recollect being much 

 struck with it at the time. Formerly these " passage-beds " were 

 classed by Sir E. Murchison with the Old Eed Sandstone; but 

 latterly he has denominated them " passage-rocks," which seems alto- 

 gether more appropriate, as showing their intermediate character 

 between the Old Eed and Silurian. Some geologists, however, I be- 

 lieve, still desire to have them restored to their original position in the 

 Old Eed. This is a question which I do not pretend to decide, 

 but which future discoveries of other organic remains may definitely 

 settle, if it is not already satisfactorily determined, my object being 

 rather to point out a greater extension of this series around the 

 "Woolhope elevation than had been previously recorded. 



There are many interesting and important questions connected 

 with aU " passage-beds "t, of which several are known to occur be- 

 tween two great epochs of geological time. It is not impossible that 

 certain old defined lines of demarcation will ultimately have to be 

 remodelled or removed, since such transition-periods may be shown 

 to prove a continuity of the geological record ; thus all such " pas- 

 sage-beds" may, in fact, be connecting links between one great 

 geological epoch and another, rather than breaks in the continuity 

 of s accession. 



2. On a New Species of Ettktptektts (E. Beodiei), from Perton, 

 near Stoke Edith, Hereeokdshiee. By HEmRY Woodwaed, 

 Esq., F.G.S., F.Z.S., &c. 



In March 1869, the Eev. P. B. Brodie, F.G.S., communicated to the 

 Geological Society a short account of the occurrence of remains of 

 Eurypterus and Pterygotus at Perton (see Quart. Journ. Geol. Soc. 

 XXV. p. 235). Mr. Brodie stated that the specimens collected at 

 that time and submitted to me were not considered to be new ; in 

 fact they consisted, for the most part, of fragments of Pterygotus J 

 (P. BanJcsii) and Eurypterus § (^E. pygmceus, E. acuminatus, E. ab- 

 breviatus, &c.), already noticed by Mr. Salter elsewhere. 



Since that communication was read, Mr. Brodie has again ex- 

 plored this locality, and has forwarded to me several parts and an 

 almost entire example of a Eurypterus, which differs considerably 



* Quart. Journ. Geol. Soc. May, 1860, pt. 2. no. 62. 



t This question was ably treated by Mr. Judd, in a paper lately read at the 

 Meeting of the British Association in Liverpool. 



t See Mem. Geol. Surv. Mon. I. 1859, pi. xii. figs. 22-46, p. 51. 

 § Quart. Journ. Geol. Soc. 1859, vol. xv. pi. x. p. 229. 



