Dr. L. Moysey — Coal-measure Arthropods. 497 



Some of the localities from -which Mr. Collins has obtained fossils, 

 especially those of Canonteign, Popehonse Close, and Doddiscombsleigh, 

 are situated on the well-known patch of Lower Carboniferous rocks, 

 stretching from the north-east corner of Dartmoor to and beyond the 

 valley of the Teign. Others, including all those from which plants 

 were obtained, consist of rocks of Upper Culm-measure, i.e. Upper 

 Carboniferous age. 



With regard to the Lower Carboniferous rocks and their fauna, 

 whether in North or South Devon, I have no remarks to make. 

 These beds may be the equivalents of the Pendleside Series, as 

 Dr. Hind has urged. On this conclusion I offer no comment. 

 I have not paid particular attention to the fauna of these rocks, 

 and I make no claim to the special knowledge of Carboniferous 

 invertebrates necessary to enable one to enter into this discussion. 



In regard, however, to the rocks at Clyst Hydon, Westwood 

 Church, Pinhoe, and Perridge, which have yielded plant-remains, 

 there can be no hesitation in believing them to be of Upper 

 Carboniferous age, and they have been mapped as such by Mr. Ussher. 

 They are what I regard as Upper Culm-measures, but which 

 Mr. Ussher has mapped as Middle Culm-measures. 1 To. which 

 division of the Coal-measures they should be assigned remains 

 uncertain, for the flora is too fragmentaiy to permit of any conclusion 

 as to the horizon. With regard to the localities from which some of 

 the mollusca, other than the Lower Carboniferous species already 

 discussed, have been obtained, I strongly suspect that they also are of 

 Upper Carboniferous age, but here again I must leave it to those who 

 are more competent than I am in such matters to confirm or refute 

 Mr. Collins' conclusions on this point. I wish, however, particularly 

 to emphasize the view that, while Mr. Collins' conclusion that the 

 rocks from which mollusca have been obtained around Exeter are the 

 equivalents of the Pendleside Series of the Midlands may hold in so 

 far as some at least of the localities are concerned, it certainly does 

 not hold in regard to those which have yielded Upper Carboniferous 

 floras, scanty though they be, in areas which no one has hitherto 

 suspected of being other than of Coal-measure age. 



IV. — On some Arthropod Eemains from the Nottinghamshire 



and Derbyshire Coal-field. 2 



By Lewis Moysey, B.A., M.B., F.G.S. 



A S several rare and interesting fossils from this coal-field have been 



J\_ described in this Magazine 3 and elsewhere, 4 it seems advisable 



to place on record several other animal remains from the same district 



1 I have, for reasons stated in my previous papers on Devonshire, adopted the 

 twofold classification of the Culm-measures initiated by Sedgwick & Murchison, 

 in preference to the threefold scheme of Mr. Ussher, whose ' Middle ' and 

 ' Upper ' are included in my Upper Culm-measares. 



- Bead in part before Section C, British Association, Sheffield Meeting, 1910. 



3 H. Woodward, Eurypterus Moyseyi, Geol. Mag., Dec. V, Vol. IV, 

 pp. 277-82, PI. XIII, 1907 ; also Prceanaspides prcecursor, Geol. Mag., Dec. V, 

 Vol. V, pp. 385-96, text-figure, 1908. 



4 B. I. Pocock, Monograph Carboniferous Arachnida : Proc. Palasont. Soc, 

 vol. lxiv, pp. 1-84, pi. in, 1911. 



DECADE V. — VOL. VIII. — NO. XI. 32 



