DORSET-SOMERSET DISTRICT. 39 



P 2 , or the Brachiopoda-bed, the upper portion of which is a complete arabesque or 

 shell-entablature ; large specimens of Trigonia costata and other Trigonia occur. 

 Brachiopoda are very numerous ; Rhynchonella spinosa, Waldheimia carinata, Tere- 

 bratula Phillipsii, and a few T. spharoidalis in the lower part. Several Gastero- 

 poda were obtained from this bed in 1885. P 3 , the upper shell-bed just under the 

 Fuller's Earth, is nearly two feet thick, and contains one or two peculiar Gastero- 

 poda, and notably the only species of Brachytrema I have succeeded in discovering 

 from the Inferior Oolite of the Dorset district. 



Loders. — An old quarry face at Upper Loders displays pretty much the same 

 sequence as at Vitney Cross. At all events the Astarte-hed, P l9 is the main 

 source of the Gasteropoda which come from here, as is the case almost everywhere 

 east of Bridport. The irony nodule-bed with the Murchisona-\ike Ammonite 

 just below is in its place about two feet underneath, then grey calciferous grits 

 and brown sand-rock, showing the lithology of the opalinus-zone, though apparently 

 without its fossils. 



Beaminstee, — This town is five and a half miles due north of Bridport. I do not 

 know of any quarries in the town, but there are some in the neighbourhood. 

 There are a few Gasteropoda marked " Beaminster " in the Buckman collection ; 

 and some have been sent to me from Mapperton, a village not far off. Judging 

 from appearances, this is a neighbourhood where the Parhinsoni-zone has lost its 

 predominance, and where such Gasteropoda as have been collected may be safely 

 assumed to belong to the Lower Division, though to what stage of the Lower 

 Division may not in all cases be clear. There is a quarry at Horn Park, one and a 

 half miles north-west of Beaminster, showing nine feet six inches of limestone. 

 The Lower Division here is five feet thick, and very full of Cephalopoda. The 

 upper four feet six inches of this quarry consists of yellowish Oolite poor in fossils, 

 which probably belongs to the Upper Division, though its rich shell-beds have dis- 

 appeared. All this favours the supposition that " Beaminster " specimens maybe 

 set down either to the concavus- (Soiverbyi-) zone or to the Murchisona-zone. There 

 is an exposure likewise at a place called Wadden Hill (marked Stoke Knap in the 

 map) not far from Horn Park, where the opalinux-zone appears to be fossiliferous, 

 since T have a specimen of the Am. torulosus from here, and two or three 

 indifferent Gasteropoda. 



Beoadwinsoe. — Three and a half miles north-west of Beaminster. This has 

 been an important quarry for many years. The face of stone is about eight feet 

 four inches thick, and presents no very definite shell-bed. There is abundance of 

 T. PhilUpsii in the upper beds, and of T. sphteroidalis lower down. The whole is 

 in the Upper Division and probably in the Parkinsoni-zone, thus forming a marked 

 exception to all other quarries in this neighbourhood. 



Detmpton, one and three quarter miles north of Broadwinsor. — Going still 



