374 DR. W. HIND AND MR. J. A. HOWE ON THE [Aug. IQOI, 



The late Mr. James Spencer, of Halifax, collected carefully from 

 the beds passed through iu tunnelling under Wadsworth Moor for 

 the Halifax Water Scheme. He obtained a very extensive marine 

 fauna, practically identical with that found at Horsebridge Clough 

 and Crimsworth Dean, but considered that the horizon was some- 

 what higher, placing the chief marine bed in the D shales, above 

 the Kinderscout or Pourth Grit. We have obtained possession of 

 this extensive collection, and the identity of the fauna with that 

 occurring at Horsebridge Clough and Marsden is very striking. 

 Mr. Spencer's fossil-lists are published ^ : the nomenclature of the 

 fossils is somewhat redundant, owing to the fact that many species 

 therein mentioned are synonyms. At Eccup, near -Leeds, an 

 extensive marine fauna is found in shale between the Third and 

 Fourth Grits : the fauna, however, is richer than that of Horse- 

 bridge Clough, containing a few more lamellibranchs. 



The Carboniferous Sequence in the Isle of Man. 



Three distinct series can be made out to exist in the Carboniferous 

 Beds in the south of the Isle of Man, but the relations of the shell- 

 mounds and the Posidonomya-heds of Poolvash are obscured by 

 lateral movements and interbedded ashes and volcanic rocks. 



Mr. Lamplugh has worked out the details, which he is now 

 publishing, so little need be said here beyond showing that the 

 three members of the series are characterized by different faunas, 

 and pointing out the similarity of the fauna of the Poolvash 

 limestones and their close resemblance in lithological character 

 to the vaguelj^-stratified, white, crystalline, highly fossiliferous 

 beds of Cracoe, Castleton, Thorpe Cloud, and Park Hill. (See 

 Appendix A, facing p. 402.) The succession is as follows, in de- 

 scending order :- — 



1. Black calcareous shales with black limestones. Posidonomi/a Becheri, 



Solenomya costellata, Orthoceras sulcatum. 



2. Masses of shelly white limestones with Productus giganteus; and a very 



rich fauna of typical Carboniferous-Limestone species. 



3. Hard blue well-stratified limestones of Scarlett and Ballasalla, with Pro/e- 



canites compressus, Edinondia sulcata^ Allorisma mouensis ; and large 

 corals— Cyatho'phyUum fragile, Zaphrentis cylindrica. 



4. Basal conglomerate. 



It is evident that in the Isle of Man, the shales between the 

 Posidonomy a-sohists and the shelly limestone have thinned out and 

 disappeared ; and it is probable that the Posido7iomya-heds and black 

 limestone are the equivalents of the Pendleside Limestone Group. 

 The Rev. J. G. Cumming described several species of Goniatiies and 

 Orthoceras from these beds, and stated that these fossils occurred 



1 Proc. Yorks Geol. & Polyt. See. n. s. vol. xiii (1898) pp. 391-94. 



