72 



SUPPLEMENT TO THE 



from the thickness of the Upper Ludlow Beds in neighbouring sections, it is improbable 

 that the Amestry Limestone would come within the section here exposed. 



" Of Brachiopoda, we believe no species have been found in the Linley Brook section, 

 except Lingula cornea, which is abundant." 



As already stated, Mr. Maw liberally forwarded to me all the specimens obtained from 

 his extensive washings and hand-pickings ; and after having carefully sorted them into 

 species, an operation demanding much time, care, and patience, we were able to ascertain 

 to what horizon each species is peculiar, or what was its stratigraphical range. Of course 

 we limit our conjectures to those species of which we have positively ascertained the 

 presence in each horizon. Some few of them may occur at levels not indicated in my 

 Table, but as they have not come to my knowledge, are necessarily omitted. A glance at 

 the Table will show that species of Brachiopoda were specifically more numerous during 

 the Wenlock than the Ludlow period ; that is to say of the eighty species enumerated 

 in the Table, sixty-eight have been obtained from the Wenlock series of Shropshire, while 

 only forty-six were found in that of the Ludlow rocks, thirty-two being common to both. 

 These numbers are the results of my personal investigation, but may require to be slightly 

 modified hereafter, or upon more extended study. Geologists and palaeontologists will 

 feel, I am sure, grateful to Mr. Maw for the great trouble he has taken in this matter. 

 It has also been the means of providing the Rev. Norman Glass with an abundance 

 of suitable specimens for his valuable researches relating to the loop- and spiral-bearing 

 species ; and these will be described in the sequel. 



I have also been greatly aided by the Rev. H. G. Day, of Brighton ; and I desire 

 gratefully to acknowledge his devoted assistance in the sorting of the specimens, rendered 

 all the more trying and difficult from the minuteness of many of the shells, and to 

 thank him for many valuable suggestions. 



Brachiopoda from the Upper S 



ILURIANS 



OF 



Shropshire 









GENERA AND SPECIES OF BRACHIOPODA. 



r. Rare. 



rr. Very rare. 



er. Not very abundant. 



c. Common. 



cc. Very abundant. 



Ludlow Series. 



Wenlock Series. 





■1" 

 1 



I! 



1 



1 



i 



i 



a 



s 



s 



< 



1 



1 



c 



i! 



1 

 i 



1 



Middle Wenlock Shales 

 (Coalbrook Dale Beds). 



Lower Wenlock Shales 

 (Buildwas Beds). 



if 



S " " 



PI 



Lingula Sysmondsi, Salter 







r 

 cc 

 cr 



c 

 r 









r 





c 







— Lewisii, (Sofo 







cr 

 cc 







— striata, Sow 







— minima, Soio. ... 





CC 



c 



— lata, Sow 





— cornea. Sow 



c 





