VINE : PALiEONTOLOGY OF THE WENLOGK SHALES. 229 
pecting fossils belonging to his speciality. Mr. John Young's labours 
may also be referred to in connection with the shales, as we owe to 
him remarks on the shell structure of Eichwaldia Capewelli, Dav., 
Geol. Mag., 1885, and while he was searching independent virgin 
shale from the Buildwas and Tickwood beds, also supplied by Mr. 
Maw, he communicated to me the results which I have embodied in 
the No. 25 X of Prof. T. Rupert Jones' Entomostraca papers. Dr. 
Davidson, however, in his list of Brachiopoda, Geol. Mag., 1881, 
pp. 108-109, does not specialise his various localities, but below the 
Wenlock limestone and above the Upper Llandovery beds he furnishes 
us with four very safe divisions : — 
4. Upper Wenlock Shales (Tickwood Beds, - No. 8. Dav.) 
3. Middle Wenlock Shales (Coalbrookdale Beds, „ 9, „ ) 
2. Lower Wenlock Shales (Buildwas Beds, ,,10, „ ) 
1. Basement Beds of W. S. (or Buildwas Park Beds „ 11, „ ) 
and the reasons given by Dr. Davidson for these divisions, are, speak- 
ing generally, correct, based as they are upon Palaeontological 
evidence. But in supplying me with the material Mr. Maw gave 
five numbers for the Buildwas beds which he wished me to keep in- 
tact. These I have preserved, and though I will not attempt to alter 
the decision of Mr. Davidson, it may be well to give to the palaeontolo- 
gist the benefit of Mr. Maw's notes on the localities, especially so, 
as I find very different organisms in the material bearing the different 
numbers now to be referred to : — 
No. 4. Upper Wenlock shale represented in the following lists by 
number 41, 42, 25 
„ 3. Middle Wenlock shale represented in the following lists by 
number 43. 
„ 2. Lower Wenlock shale represented in the following lists by 
numbers 22, 37, 36, 38, 40. 
and unless No. 22 will correspond with the basement beds of Mr. 
Davidson, I have no other number that will fit in. 
Over the Wenlock limestone, which is No. 7 of Mr. Davidson, 
there is another lot of shales and this completes the Wenlock series 
of the authors: — 
