154 



BRITISH PALEOZOIC PHYLLOCARIDA. 



The fossiliferous horizon in the quarry is not far below the base of the Millstone- 

 grit at this place. 



In a letter dated December 4th, 1897, Dr. W. Hind has favoured us with the 

 following section of the strata shown in this quarry : 



a. Shales with marine fauna and Dithyrocaris. 



* Indicates the horizon at which D. testudinea was found. 



B. Shales with GlypTioceras spirale. 



C. Quartzose gannister-like sandstone with plant-reuiains. 



In Dr. W. Hind's opinion these do not belong to the so-called Yoredale series, 

 and he describes them in detail thus : 



The quarry shows the following strata downwards : 



a. Dark shales, with thin bands of concretionary limestone or seams of 

 calcareous nodules, all more or less fossiliferous ; with Glyphoceras diadema, and 

 the fauna noted in Dr. W. Hind's Monograph, and in the ' Geol. Mag.,' 1897, 

 pages 207, 208 : 15'. 



It was in the lower part of these shales that the Dithyrocaris (1J. testudinea) 

 was found, together with Ceratiocaris Ortonensis. 



b. Thin carbonaceous shales with Glyphoceras spirale, Posidoniella leevis, 

 Productus corn, and Streptorhynchus crenistria : 1'. 



c. Hard gannister-like quartzite, with shale-partings and plant-remains : 20'. 

 Loamy shale : 4'. Hard compact fine-grained quartzite : 4'. Dark shales a few 

 feet to the floor. 



At page 72 of the ' Mem. G-eol. Survey : Country round Stockport, &c.,' 1866, 



the strata seen in this quarry at a, b, c, are thus described : 



In a quarry by the road-side, south-west of Holly "Wood, we have — 



Dark shale, with fossil-bearing nodules of limestones : 15'. Hard, dark-grey 



quartz rock (gannister), with thin partings of dark shale, containing layers of 



coal, from one-eighth to one-fourth of an inch thick ; large Stigmaria with 



rootlets : 20'. 



The following is a section of the Lower Carboniferous strata in Cheshire, where 

 the roadside quarry, south-west of Holly Wood, referred to by Dr. W. Hind, is 

 situated. 



