ORDOVICIAN BRACHIOPODA 



9i 



from each other by 86% of their length ; adductor scars suboval, faintly impressed 

 on either side of low median ridge and extending anteriorly for 59% of the length of 

 the brachial valve. 



Type material. 



Holotype External and internal moulds of brachial valve 



(BB 35446a, b) 

 Paratypes External and internal moulds of pedicle valve 



(BB 35447a, b) 



External and internal moulds of brachial valve 



(BB 35448a, b) 



External and internal moulds of brachial valve 



(BB 35449^, b) 



External and internal moulds of brachial valve 



(BB 3545oa, b) 



Type horizon and localities. Meadowtown Beds : BB 35446 from loose flags 

 by the side of Minicop Farm (Grid Ref . SJ 314018) ; BB 35450 from flags in Ouinton's 

 Quarry in the field 200 yds north-east of the chapel at Meadowtown (Grid Ref. 

 SJ 312013) ; BB 35448-9 from tuffaceous flags 100 yds south-east of Minicop 

 Farm (Grid Ref. SJ 315018) ; BB 35447 from shales along Meadowtown- Rorrington 

 road 220 yds from Meadowtown Chapel (Grid Ref. SJ 309012). 



:ngth 



width (mm) 



3-0 



3-8 



3-2 



37 



i-6 



2-4 



17 



2-5 



2-5 



3-2 



Dalmanella salopiensis gregaria sp. et subsp. nov. 

 (PI. 15, figs. 13-16, 20) 



Diagnosis. Like Dalmanella salopiensis but with a brachial valve 74% as long as 

 wide and 16% as deep as long ; dental plates 19% as long as the pedicle valve and 

 184% in lateral extent as long ; ventral muscle scar 36% as long as the pedicle 

 valve ; subparallel brachiophore bases 23 % as long as the brachial valve and separated 

 from each other by 91% of their length. 



Type material. 



Holotype External and internal moulds of brachial valve 



(BB 35443a, b) 

 Paratypes External and internal moulds of pedicle valve 



(BB 35444a, b) 



External and internal moulds of brachial valve 



(BB 35445a, b) 



Internal and external moulds of pedicle valve 



(BB 35407a, b) 



length width (mm) 

 2-5 3-5 



2-4 



3-8 



2-8 



2-8 



5-o 



