S^iLTEr. AXD HICKS MElSrETIAN FOSSIXS. 51 



and Littleham Bay '' Waterstone beds " and pseudomorphous crystals 

 of chloride of sodium occur. 1 agree with Mr. Symonds that the beds 

 found near Exmouth are AYaterstone, but I have not been able to find 

 there any trace of the pseudomorphous crj'stals. 



In communications made by Mr. Strickland (Quart. Journ. Geol. 

 Soc. Yol. ix. p. 5) and myself (Quart. Journ. Geol. Soc. vol. iv. p. 273, 

 & vol. ix. p. 185) it has been shown that these pseudomorphs are found 

 in Nottinghamshire, Cheshire, Worcestershire, and Gloucestershire. 

 I have found them in Somersetshire (at Blackbrock, near Taunton), 

 and now on the south coast of Devon ; they therefore occur over the 

 greater part of the area of the Trias in England. 



On a small fragment of Waterstone that I picked up on the beach 

 at Exmouth, the marks very closely resemble the reptilian traces 

 found in the Keuper of Runcorn, in Cheshire. As the fragment is 

 small, and reptilian traces have not been found in the Trias in De- 

 vonshire, I cannot speak with certainty, but mention the matter in 

 order that the attention of other observers may be drawn to it. A 

 series of small " thi'ows down " to the west appear to intersect the 

 Trias between Culverhole point and Exmouth. 



3. On some Fossils from the '^ Mexevian Group." By J. W. 

 Saltee, Esq., F.G.S., A.L.S., and Hexet Hicks, Esq. 



(Eead June 17, 1868^.) 

 [Plates II. & HI.] 



Descriptioxs of some of the principal fossils of the Menevian forma- 

 tion, including the large Paradoxides (JP. Davidis), appeared in the 

 Quarterly Journal of the Society for August 1864, and others in the 

 number for jS^ovember 1865 ; but as many new forms have been 

 obtained since then, a large number yet remain to be described. The 

 continued research, carried on by one of the authors, in the typical 

 locality, St. David's, has been the means of discovering the ^Thole of 

 these new forms, many of which, however, have been subsequently 

 found in various other places. Around the Merionethshire anticlinal 

 ridge of Lower Cambrian rocks large collections have been made : — on 

 the north side, near Maentwrog, and at Tafarn Helig, near Traws- 

 fynydd, by Messrs. D. Homfray and B. A. Eskrigge ; and on the south 

 side near Dolgelly by Messrs. T. Belt, E. Williamson, J. Plant, and 

 J. C. Barlow, — all of whom have also done something towards defi- 

 ning the boundaries of the group in North Wales. Much also has 

 been done by us, in like manner, in South Wales, and many new 

 localities have been found to be occupied by this interesting group. 



The range of some of these fossils has been more clearly ascer- 

 tained, and greatly extended. They are not in any way limited to 

 the black Lower Lingula -shales, but occur also in the hard grey rocks 

 which form the upper bands of the Harlech grits. 



One of the authors has recently found both Trilobites' and Shells 



^ For the other Communications read at this Evening Meeting, see Quart. 

 Journ. Geol. Soc. vol. xxiv. p. 484. 



e2 



