420 AVELLBURN : FISH FAUNA OF THE LOWER COAL MEASURES. 
Thfi Coal strata in the Litthborouyh district to which this 
paper refers is that portion of the Lower Coal Measures of 
Lancashire which includes the following coal seams, viz.: 40 
3'ards Mine, Upper Foot Mine, Gannister coal, Lower Foot 
Mine, and Yard Mine at the base. 
The conditions attending their deposition seem to have been 
very similar to those in the Halifax district, there being evidence 
of fresh water and marine conditions. 
Corrdation of the Coa/seanis of the two districts. 
IlaUfax District. Littleborough Distinct. 
36 yards Coal t = 40 yards Mine.t 
Hard Bed Coal t = Upper Foot Mine.t 
Gannister Coal. 
Middle Band Coal) 
Soft Bed Coalt ^ 
Thin Coal = Lower Foot Mine.t 
I ha^e not as yet found any fish-remains in the other beds, 
but feel confident that, with a more extended research, they will 
yield a fairly rich fauna. 
State of Preservation of the Fossils. 
With few exceptions the specimens, although fragmentary, 
are in a good state of preservation, and do not seem to have 
suffered much from "rolling or abrasion." 
Table 
OF 
THE Halifax Coal Strata.; 
L 
Flagrock 
70 ft. to 150 ft. 
2 
Shales and 
Ragstone 100 ft. to 150 ft. 
3. 
80 yards Band 
Coal and Seat-earth ... 2 ft. to 3 ft. 
4. 
60 „ 
5> 
Stone, "Quarrel"' Rock, kc. ...100ft. 
5. 
48 „ 
?5 
Coal ... ... ... ... 8 in. 
6. 
48 „ 
Stone ... 6 ft. to 12 ft. 
7. 
Shales ... 
28 ft. 
* This " correlation " is given on the authority of Mr. John Butterworth, 
F.R.M.S., of Shaw, near Oldham. 
t Fish-remains are found in these beds. 
:t Taken from the paper on "The Halifax Coal Strata"' by the late 
Mr. James Spencer, of Halifax. 
