632 



JlPw R. D. TERNON ON THE GEOLOGY AND [DeC. I912, 



List op Fossils fkom the Marine Bed in the Rooe of the 

 Seven-Feet Coal. 



Species. 



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Annelida. I 



Spii-07'bis SY) X 



B r a c h i p da. ; 



Lingida mytiloides Sow X 



Orbiculoidea sp 



L a m e 1 1 i b r a n c li i a t a. 



Aviculopeeteu gentilis Sow 1 X 



I'terinopecten papi/raceus (Sow.).. x 



Myalina compressa Hind ! X 



Myalina cH.jlemingi M'Coy j 



Niicula tmdtdata Phillips 



Nucula s-p I X 



Schizodus ST[) 



Fteronites, sp. nov I ... 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 1 



X 



X 



X 



.X 1 



X 









X 



X 





... 

 ... 



X 

 X 

 X 



X 

 i X 



In addition to the fossils in the above list, ostracoda occur at each 

 locality, and from Hockley-Hall Pit a few badly-preserved specimens 

 of gasteropoda have been obtained. 



The list shows that apparently the cephalopoda are entirely 

 absent, and that the lamellibranchiata predominate over the 

 brachiopoda. Three of the species in this bed are exceedingly 

 common ; they are : — Lingula mytiloides (Sow.), PterinojMCten 

 jxtpyraceus Sow., and Myalina compressa Hind. The first two 

 are also abundant in the marine beds of other coalfields ; but 

 M. compressa, which is the characteristic fossil of this bed, is not 

 common in other areas. 



The fossil figured in PI. LX, fig. 6 is an internal cast of a shell, 

 to which is attached a specimen of Lingula mytiloides Sow., but 

 the latter is not shown in the photograph. Dr. Wheelton Hind 

 considers the shell to be a freshwater Carhonicola, which has been 

 washed into the marine bed. 



Fossil fishes.— At least three fish-bearing beds have been 

 detected in the Middle Coal Measures, and their position in the 

 sequence is shown below : — 



1. Tbick Coal (and its constituent seams: the Ejder Coal and the Slat© 



Coal). 



2. Seven-Feet Coal. (Fish-band in the Marine Bed.) 



3. 



r Double and 

 1 Bench Coals. 



