284 
vine: palaeontology of the wenlock shales. 
" The Wenlock shales, in Shropshire, which cannot be much less 
than 1800 to 1900 feet in thickness, have a developement much in 
excess of the Wenlock shale in the Malvern district, where Professor 
Phillips estimated it to be 640 feet thick : indeed its thickness in 
Shropshire is greater than in any other district, unless we except the 
supposed equivalents, the Denbighshire flags, which Mr. G. Maw 
believes will be found to belong to a distinctly lower horizon." " 
1 . Upper Llandovery. 
2. Baildvvas beds, Nos, 22, 37, 36, 38, 40. 
3. Coalbrookdale beds, No. 43. 
4. Tickwood beds, Nos. 26. 41, 42. 
.5. Wenlock limestone and shales, Nos. 24-46. 
6. Ludlow series. 
As there are a variety of opinions extant as to the proper place- 
ment of certain species of the Palaeozoic Actinozoa, whether with the 
Coelenterata or with the Bryozoa of American authors, the student will 
find ample details respecting these in a paper on the Silurian Poly ozoa 
in the present part of the transactions. As, however, there are other ^ 
species of which no details are furnished, the following brief notes 
may be acceptable. 
1. Favosites Bowerbankia, Ed. & H. (Nicholson's Tab. Corals, 
p. 73.) 
= Monticuhpora ? Bowerbankia, Brit. Foss. Cor., p. 268. 
There are two or three fragments which may be, though doubt- 
fully, placed here. I cannot detect "mural pores" in them, but 
Nicholson says that "mural pores" are fewer in number in British 
than in Swedish examples. 
Op. Cit., p. 102. 
