2. Mountain-limestone \ 



i Carbc 



„ 1700 „ 

 „ 1000 „ 

 Calcareous " division, and 



176 BRITISH PALJ^OZOIC PHYLLOCARIDA. 



plicata, Kirlihija, sp., Argilloecia xqualis, and Cijtherella, sp. Also tliat K. plicata 

 and other species occur at other localities near New Castleton. 



Mr. Dunn has favoured us with the foUowinof note on the succession of strata 

 comprised in the " Redesdale Limestone and Shale." The late Mr. George Tate, 

 of Alnwick, divided the Carboniferous rocks of Northumberland into the — 

 1. Coal-measures . . . about 2000 feet. 



„ 900 

 rbonaceous 

 3. Tuedian 

 The " Redesdale beds " belong to the base of the 

 they are as follow : 



1. Shale, containing " Leaf" ironstone nodules. Often replaced by red 

 Boulder-clay, 10 feet. 



2. Redesdale Limestone, 14 feet. 



3. Clayey Sandstone, containing Stigmaria with rootlets, 16 inches. 



4. Yellow, fine-grained Sandstone, calcareous in many places, 9 feet. 



5. Ironstone Shale, 30 feet. Near the top is an ironstone band, about 4 inches 

 thick, and full of organic remains. Fossihferous ironstone nodules, sometimes in 

 beds, ai'e scattered throughout this shale. 



6. Sandstone, 60 feet. A coal-seam,^ 14 inches thick, occurs in this sandstone. 

 From the Shales and Ironstones of Redesdale Mr. J. Dunn has collected 



Dithyrocaris glabra, D. tricomis (PI. XXII, fig. 5), D. Dunnii (tail-pieces, 

 PI. XXIII, figs. 9 and 10), several Gastric Teeth of Dithyrocaris (PI. XXVI, 

 figs. 21 — 26, 35, 36), Trilobites {Phillipsia, &c.), and some fish remains, besides 

 other fossils, obscure and fragmentary. 



11. Dithyrocaris Belli, E. Woodward, 1871. Plate XVIII, figs. 8 a, h, c. 



DiTHTEOCAEis STEIATUS, H. Woodward, 1871. Ilep. Brit. Assoc, for 1870, 



Sections, p. 90. 



— Belli, H. Woodward, 1871. Geol. Mag., vol. viii, p. 106, pi. iii, 



fig. 5. 



— — — 1872. Canadian Naturalist, vol. vi, pp. 18, 



19. 



— — S. A. Miller, 1877. Americ. Pala;oz. Foss., p. 217. 



— — Bigshy, 1878. Tbesaur. Dev.-Carb., p. 27. 



■• See also G. A. Lebour's 'Outlines of tlie Geology of Northumberland,' 1878, pp. 38, &c. 



