Professor T. Riqjerf Jones— Mr. W. W. Watts. 95 



ENTOMOSTEACA IN COAL-SHALES. 

 Sir, — In the black shale lying around the bases of some of the 

 Sigillarian tree-stumps or stools, containing remains of small 

 Amphibia {Bendrerpeton, etc.), and Land-shells {Pupa, etc.). at the 

 South Joggins, Principal Dawson, of Montreal, has detected numerous 

 specimens of Entomostraca.^ Portions of this shale, forwarded for 

 examination, have yielded to my friend Mr. J. W. Kirkby and 

 myself several specimens of Carbonia fahulina, J. and K.,^ mostly 

 of the typical form, but some belong to the variety which we term 

 himilis.^ All of them have the surface of the valves either punctate 

 or subreticulate. The muscle-spot is only indicated in one or two 

 subtranslucent specimens. A single valve of a larger and relatively 

 longer species is near to, if not identical with, our CytJiere ? 

 bairdioides.^ Besides 1. Carbonia fahulina, with its var. hmilis, 

 and 2. C. ? bairdioides, there are present in this shale — 3, Ganoid 

 scales of Fishes ; 4. very thin shells like Anthracomya (Naiadites) ; 

 5. Sjjirorbis {carbonarivs, or near it) ; 6. bits of carbonized wood, 

 showing structure ; 7. Obscure Plant Kemains, abundant. 



T. EuPERT Jones. 



CERVUS MEGACEEOS IN BEEKSHIRE. 

 Sir, — Portions of the Antlers of two individuals of the Gigantic 

 Irish Deer ( Cervus megaceros) dug out of the Peat of the Kennet 

 Valley, at Aldermaston, have been lately procured by my friend Mr. 

 Walter Money, F.S.A., of Newbury, and will probably find a resting 

 place in the Museum of the Oxford University. This authenticated 

 find of Cervus megaceros in the Post-glacial or Quaternary alluvium of 

 Berkshire will be of interest to some of your readers. 



T. EupERT Jones. 



PEBBLE FEOM THE CAMBEIDGE GEEENSAND. 

 Sir, — I notice that in your September Number Mr. Keeping calls 

 attention to a pebble of the Wrekin devitrified pitchstone which was 

 found in the Upper Neocomian deposit of Potton. It may be of 

 interest to some of your readers to know that I found a pebble of a 

 rather similar nature in the Cambridge Greensand near Horningsey, 

 last June. It was a subangular fragment showing well-marked 

 fluidal structure. Prof. Bonney kindly had a thin section cut for 

 me, and examined it. He said, "It is a sort of devitrified pitch- 

 stone or rhyolite with well-marked fluidal structure ; it is inclined 

 to be spherulitic, and the nature is undoubted." He thinks, how- 

 ever, that it has not exactly the structure of the Wrekin pitchstones, 

 but might possibly be matched either in Scotland or Norway. 



Sidney College, Cambridge, yr ry W.tts 



Nov. lith, 1880. 



1 See the " American Journal of Science," vol. xx. November, 1880, p. 404. 



2 " Annals Nat. Hist." ser. 5, vol. iv. p. 31, pi. 2, figs. 1-10. 

 s Ibid. figs. 11-14. 



* Ibid. p. 38, pi. 3, figs. 24-26. 



