Vol. 6 3.1 IJSTLIER IS TEE EASTERN MENDIPS. 22' 



BrACIJIOPOD: 



Qrthis eleganiula, Dalm. (very I Orbiculoidea rugata ? (Sow.). 



common). Spirifer crispus, His. 



Orthis basalts (?) Dalm. 

 Strophomena compressa (?) Sow. 

 Ehynchonella Davidsoni, M'Coy (very 



common). 



Ekynckotreta ouneata (?) So^ 



Skenidium Lewisi (?) Dav. 

 Meristina tumida (?) Dalm. 

 Meristella crassa (?) Sow. 

 Rhynchospira Baylei, Sow. 



Lamellibrancuiata. 



Ctenodonta Ungualis. Phill. I Pterincea subfalcata, Conrad. 



Pterimea retroflcxa, Wahl. j Grammysia cingulata, His. 



Gasteropoda. 



Horiostoma, globosum, Sow. I Platyceras sp. 



Pleurotomaria sp. | Trochoncma sp. 



Mr. Eeed writes as follows with regard to these lists of fossils : — 



'Sunny hi 11. — The few very badly-preserved fossils in the ashy rock from 

 Sunnyhill indicate a Silurian age— either Llandovery or Wenlock, but there are 

 no characteristic species determinable (except perhaps Lingula Symondsi), and 

 the collection is too small and the specimens too poor to fix precisely the age 

 of the beds. 



'Tadhill. — The fauna of the Tadhill beds does not offer quite conclusive 

 evidence as to its precise age, most of the species having a considerable vertical 

 range throughout the Silurian. The fossils Lindstroemia elongata and Cteno- 

 donta Ungualis suggest an Upper Llandovery age. and none of the other fossils 

 that have been specifically determined with certainty can be considered as 

 hostile to this view. But we cannot help noticing the absence of certain typical 

 Upper Llandovery species, such as Pentamcrus oblongus and SlricMandinia 

 liratd, which we might expect to find associated with such forms as Pterincea 

 retroflcxa. Spirifer crispus, Ehynchonella Davidsoni (the commonest fossil at 

 Tadhill), Horiostoma globosum, Cornulites serpularius, Phacops Downingice, etc. 

 These last-mentioned species might be of Lower Wenlock age, but there is no 

 strongly-marked Wenlock facies in the fauna, nor any species peculiarly 

 charactei'istic either of that horizon or of the Wenlock Limestone. The affinities 

 with the Lower Llandovery and Ludlow are practically nil ; and it seems wiser, 

 on the strength of Lindstroemia elongata, to refer the beds to the Upper 

 Llandovery rather than to any other horizon.' 



(3) The Coarse Ashy Conglomerate. 



It has been already mentioned that a gap, of rather more than 

 half a mile, in the trap-exposures extends between Moon's-Hill 

 Quarry and Tadhill Farm. This area is, however, occupied, in 

 part at any rate, by a mass of coarse ashy conglomerate, probably 

 the most remarkable rock in the district. It is best seen in a new 

 quarry, opened in 1905 in a held north-north-west of Holland's 

 Copse, about midway between Moon's-Hill Quarry and the farm 

 called ' Yellow Marsh ', at a spot where no trace of exposures pre- 

 viously existed. The rock proving unsuitable for economic purposes, 

 the quarry was soon abandoned and is now half full of water. 

 Probably a thickness of not less than 12 feet of ashy conglomerate 

 would be seen, if the pit were dry. The rock which, so far as 



