568 



J. W. KIEKBY ON MAEINE FOSSILS IN THE 



Lower still, at 3230 feet, in a grey shale overlying another bed of 

 limestone, Myalina modioUformis appears in great numbers. Along 

 with it, and in the limestone, are the following species : — 



Fossils of Zone 11, a^ 3230 feet (just to the east of the Target, 

 Billow Ness). 



Leperditia Okeni, var. scotoburdi- 



galensis, Hih. 

 Lepidodendron and Lepidostrobus, 



Myalina modioliformis, Brown. 

 Beyrichia subarcuata, Jones. 

 Carbonia fabulina, J. ^ K. 



subula, J. (^ K. 



Eankiniana ? or bairdioides ?, J.S^K. 



50 feet of measures intervene, which mainly consist of purplish, 

 grey, and yellow false-bedded sandstone in a thick stratum. An 

 8-inch coal lies a few feet below the limestone. 



Then at 3280 feet comes in a 2-feet bed of limestone, hard, 

 grey (weathering yellow), and shaly at the top, with a laminated 

 shale above, and a black shale, thin coal, and fireclay below. In 

 these deposits occur the following fossils : — 



Fossils of Zone 12, at 3280 feet. 

 In the upper shale : — 



Lingula squamiformis, Fhill. 

 Beyrichia subarcuata, Jones. 

 Leperditia Okeni, var. scotoburdiga- 

 lensis, Hih. 



Scales of small G-anoids. 

 Ooprolites (Ehizodus). 

 Sphenopteris affinis (rare). 



In the limestone : — 



Littorina scotoburdigalensis, Eth. 

 Dithyrocaris (tooth). 

 Beyrichia subarcuata, Jones. 

 Oythere ?, sp. 



In the shale below : — 

 Lingula squamiformis, Fhill. 

 Myalina modioliformis, Brown. 

 Schizodus Salteri, Eth. 

 Beyrichia subarcuata, Jones. 



Leperditia Okeni, var. scotoburdiga- 

 lensis, Hih. 



Okeni, var. attenuata, J. ^ K. 



Spirorbis, sp., attached to plants. 



Kirkbya spiralis, J. ^ K. 

 Leperditia Okeni, var. scotoburdiga- 

 lensis, Hih. 

 Scales of small Ganoids. 



Fig. 1. — Section of strata at Zone 12. 



«Av:< 



a. Grey shale ; h. Tough dark shale with Lingula, &c. ; c. Limestone ; d. Band 

 of Bchizodus in black shale ; e. 3-incb seam of coal ; f. Fireclay with 

 Stigmarian rootlets ; g. Grey shale. 



