395 
ON SOME FOSSIL FISH FOUND IN THE MILLSTONE GRITS OF YORKSHIRE. 
BY EDCxAR D. WELLBURN, L.R.C.P. 
{Read June lOth, 1898.) 
Plate LX. 
On January 27th, 1874, Mr. John Aitken, of Bacup, read before 
the Manchester Geological Society a paper on some fossil fish- 
remains he had found in the Millstone Grit series at Wadsworth 
Moor, near Hebden Bridge. They were found during the execution 
of the works carried on by the Halifax Corporation for conveying 
water from Widdup valley to that town by a tunnel excavated 
through AVadsworth Moor in the direction W. and E., and at a 
depth of 384 feet from the surface. At this horizon a bed of fine 
Hack laminated shale was encountered, having all the appearances 
and characters of a true Coal Measure shale. On splitting this shale 
the surfaces revealed the presence of multitudes of fossils, some being 
very perfect, others fragmentary, Goniatites and Aviculo-pectens 
prevailing. The shale also contained a number of nodular concre- 
tions, and from these the largest number of the fish-remains were 
obtained, a few others being found in the shale itself. 
''^Section shoicing the exact jjositioii occiqned by the fossiliferoiis shale. 
Xo. I. Grit.— Rough Rock 100 feet. 
Shales 300 feet. 
Xo. II. Grit. — Grey Grits of Rocking stones... 80 feet. 
Shales ... ... ... ... 350 feet. 
No. III. Grit or Galliard rock with Coal strata 100 feet. 
Blue Shales (fish in thin shales 
200 feet from the top) 450 feet. 
Xo. IT. Grit.— Pebbly Grits 120 feet. 
Yoredale strata ... ... ... ... ... 600 feet. 
On November 14th, 1896, Prof. P. F. Kendall, I'.G.S., and 
Mr. A. Slater, B.Sc, found in some dark shales at the base 
of the Middle Millstone Grit (probably the same as the Third Grits 
of Mr. James Spencer) a slab containing the remains of two genera 
of fish, viz., Acanthodes sp. ? and Acrolepis Hopkinsi McCoy. 
* After the late Mr. James Spencer. 
