288 feEPORtS OK tttE STATE OF SCIENCE; 



ihc i'olluwlug analysis, luadc by Mr. J. H. Sturgess in the Cliejiiictll 

 Lalioratoiy at University College, Bristol, is intemled to replace it : — 



■A.I2O3 1 oq-91 



SiO 61-lG 



CaO' .... 4-90 



MgO .... 0-62 



P2O. .... 019 



K„0 . . . . 2-68 



Na'jO .... 4-84 



H.,0 .... 211 



99-71 



3. New tine of Hails from Dounhead Qtiarry. — Since the publication 

 of the previous paper a line of rails has been laid from Downhead quarry, 

 past Walltyning to Long Cross Bottom, and several interesting little 

 sections have been exposed. At a point \ mile N.E. of Long Cross 

 Bottom there is a cutting in Old Red sandstone and conglomerate dipping 

 8. at 45°. Two hundred yards farther E. a cutting in fine greenish 

 sandy shale yielded the following fossils, which have been identified 1iy 

 Mr. F. R. Cowper Reed : — 



Pltolidops imjdicata, Sow, 

 Lingula Si/mondsl {'/), Salt. 

 Lcj}t(Pii<i rhomboidalis, Wilch. 

 Spirifer 2>licatelhis vav. radiatiis, Sow, 

 Atrypa sp. 

 Crinoid stem joints. 

 Cwnites lahrostis, M. Edw. 



A trench opened on the hill slopes a few yards to the N. of thi.s 

 cutting .showed similar material, and contained ; — 



Pholidops implicuta, Sow. 



Merutella, of. furcata, Sovvf. 



Sim-ifer plicatellns var. radiatiis, SoWi 



Ortliis sp. 



Beyricliia sp. 



Calymenc sp. 



Phacops Weaveri, Salt. 



In Mr. Reed's opinion these fossils clearly indicate that the rock is of 

 Llandovery age. .Judging from the strike, the rocks at this point occur 

 not many feet below the Old Red sandstone, and certainly there would 

 be no room for a development of the Wenlock and Ludlow series between 

 them and the Old Red sandstone. Tliese exposures, therefore, afford con- 

 firmation of the view previously arrived at, viz., that the Llandovery 

 rocks of the Eastern Mendips are directly succeeded by the Old R.ed 

 sandstone. A second exposure of Silurian — in this case a fine-grained 

 grit with shale — occurs near Holland's Copse, about 300 yards to the E, 

 of that just described. No fossils were found here. These three ex- 

 posures, which are in all probability in the newest Silurian rocks of the 

 district, are noteworthy from the fact that the rocks are normal sediments 

 without any admixture of igneous material, while all the other Silurian 

 rocks throughout the inlier are wholly or partially igneous in origin. 



4. Downhead. — Hitherto the only evidence of fossiliferous Silurian.s 

 in this neighbourhood has been afforded by bits thrown out by moles and 

 rabbits. A trench was, however, dug on the hill .slope opposite the 



