556 Notices of Memoirs — British Carboniferous Rocks. 



eminences of Glacial drift, whereas the occupation of the valleys by 

 Glacial ice, particularly in the stagnant stages of retreat, prevented 

 their being permanently filled ; with the final x'etreat of the ice the 

 molds of glaciers remained as the channels of the Sound. This 

 hypothesis is to be contrasted with that of erosion, due to repeated 

 uplift and subsidence. 



IV. — Life-Zones in the British Cakboniferotjs Eocks. — Eeporfc 

 of the Committee, consisting of Mr. J. E. Maer (Chairman), 

 Mr. E. J. Garwood (Secretary), Mr. F. A. Bather, Mr. G. C. Crick, 

 Mr. A. H. FooRD, Mr. H. Fox, Dr. Wheelton Hind, Dr. G. J. 

 HiNDE, Mr. P. F. Kendall, Mr. R. Kidston, Mr. J. W. Kirkby, 

 Mr. G. W. Lamplugh, Professor G. A. Lbbour, Mr. G. H. 

 Morton, Professor H. A. Nicholson, Mr. B. N. Peach, Mi-. A. 

 Strahan, Dr. Traquair, and Dr. H. Woodward, appointed 

 to study the Life-Zones in the British Carboniferous Eocks. 

 (Drawn up by Mr. Garwood.)^ 



N consequence of the early date on which it is necessary to submit 

 reports, little work has been done this year up to the present 

 time, but it is hoped that during the summer months progress may 

 be made with the work of the Committee, and collections may be 

 obtained from localities of special importance. 



At present a collector is engaged upon the fauna of the Millstone 

 Grit at Eccup, five miles north of Leeds, where a fossiliferous black 

 shale has been met with during the excavation of a puddle-trench 

 for a reservoir, The bed occurs about the centre of the " Middle 

 Grits " of the Yorkshire Millstone Grits. 



The bed, which was discovered by Mr. Percy Kendall, some 

 three years ago, contains a rich marine fauna, which has not yet, 

 however, been properly worked out. The fauna includes species of 

 Nucula and Leda in great abundance and in excellent preservation, 

 also numerous individual specimens of Lingula and Discina. Gastero- 

 pods occur, and a few specimens of Goniatites, together with 

 well-preserved specimens of Conidaria. Several specimens of 

 Dithyrocaris have been found, and a single specimen of a minute 

 Trilobite, cf. Brachymetcpns Ouralicus. Fish-remains referable to 

 two genera have been identified. 



The fauna appears to bear little resemblance to that of the Cayton 

 Gill beds of Niddei'dale, which lie at approximately the same horizon 

 in the Millstone Grit. On the whole, the fauna appears to resemble 

 in many points that of the Eidsdale Ironstone shale of the Bernician 

 beds of South Northumberland. The Committee hope that the 

 information obtained from this deposit will be of value, in consider- 

 ation of the comparative neglect with which the fauna of the 

 Millstone Grit has hitherto been treated. 



Owing to the temporary nature of the exposure, the Committee 

 considered it advisable to expend a considerable portion of the grant 

 in obtaining the services of a competent collector, who has spent 



1 Eead before the British Association, Section C (Geology), Toronto, 1897. 



