96 Correspondence — Mr. Edwin Broicn. 



oppose a mere unsupported recollection to an opinion formed upon the 

 spot by, probably, a more competent judge. I therefore gave Mr. 

 Hall's figures, stating that the thickness assigned was " unusual." 



I think these are the only points in Mr. De Eance's communica- 

 tion requiring a rejDly. The rest of his letter appears to refer to 

 the paper regarding the authorship of which I have made so un- 

 fortunate a mistake. Charlotte Eyton. 

 BiDDULPH, CoNGLETON, January 5th, 1871. 



ON THE SUPPOSED PHOLAS-BORINGS IN MILLLER'S DALE. 

 Notwithstanding the statement we inserted in our last number 

 (p. 40), that Mr. Bonney had submitted to us his specimen from 

 Miller's Dale, which is beyond doubt limestone, and perforated in the 

 way described, we have received another letter from Mr. Edwin Brown 

 on the subject. He is still firm in the belief that no such borings 

 exist in the limestone where indicated in Mr. Bonney's diagram, and 

 he states that the roadway in question has been cut in a bed of 

 loadstone, and at so recent a date as not to be laid down in the 

 Ordnance Maps. He invites geologists to visit the spot and to judge 

 for themselves. We think it will be better not to discuss this sub- 

 ject further. The specimen is still in our possession, and those who 

 feel interested may examine it at any time. The locality described 

 is of course equally open to those who may have the opportunity of 

 visiting Miller's Dale (see Mr. Bonney's paper, Geol. Mag., Vol. 

 Vn., 1870, p. 267).— Edit. Geol. Mag. 



A NEW LOCALITY FOR LEAIA. 



Sir, — At page 219 of No. 71 of the Geol. Mag. are some notes 

 on the little bivalved Entomostracan Leaia, and its distribution, 

 South Wales having then (May, 1870) yielded numerous individuals 

 of this rare genus to the researches of Mr. Wm. Adams, F.G.S. 



Thanks to Mr. C. W. Peach, the veteran geologist, of Edinburgh, 

 I am enabled to add another locality, and the most northern yet 

 known, for this genus, as I have had the opportunity of examining 

 an easily determined, though somewhat crushed, pair of valves in 

 a piece of ironstone from near Edinburgh. They do not offer any 

 new specific characters. Like the others already met with (except- 

 ing a Lower Permian form from Neunkirchen, in Germany), Mr. 

 Peach's specimen is from the Carboniferous formation. 



Mr. Peach tells me that " the clay -ironstone nodule containing 

 this Leaia is from the Lower Carboniferous Shales of Wardie, on 

 the Forth, near Edinburgh. The nodules from these shales (flat- 

 tish in shape, with rounded outlines) contain coprolites, fishes, plants, 

 etc. The shales also contain similar organisms ; in fact, they are 

 very rich indeed, and have been a famed hunting-ground for palee- 

 ontologists. Agassiz long ago described six species of fish from 

 these beds ; and since then others have been discovered. Full 

 particulars may be found in the Memoirs of the Geological Survey 

 of Great Britain : the Geology of Edinburgh ; Map 32 of Scotland, 

 1861, pages 30 and 31." T. Eupert Jones. 



