dALCIFEEOXIS SANDSTONE 01* EIPE. 567 



localities occurs along with Myalina modioUformis, Schizodus Salteri, 

 Orthoceras, and other fossils. 



Between the last-named limestone and the next marine bed the 

 measures are disturbed, and there are probably some strata wanting 

 in the section visible. Eather over 100 feet of measures are seen, 

 consisting of alternations of yellow and purple, irregularly bedded, 

 and ripple-marked sandstones, with grey shales and fireclays. Three 

 thin coals are included in this mass of strata. Cydopteris flahellata 

 and Stigmarian roots and rootlets are the prevailing fossils. In the 

 roofs of one of the coals are the stools and flattened trunks of large 

 trees ; and in another are smaller stems coated with Spirorhis. 



From beneath these disturbed strata there rises a thin bed of 

 limestone, one foot thick, containing a decidedly marine group of 

 species. The limestone is grey (weathering yellow) and very hard. 

 Beneath it, separated by 8 inches of black shale, containing plants 

 and the scales of small Ganoids, is 3 inches of coal resting on fireclay 

 with rootlets. 



Fossils of Zone 10, at 3130 feet. 



Bellerophon decussatus, Flem. 

 Macrocheilus striatulus, sp. nov. 

 Murchisonia striatula, JDe Kon. 

 JSTaticopsis ?, sp. 

 Cypricardia, sp. 

 Leda attenuata, Flem. 

 Myalina sublamellosa, Eth. 

 Modiola divisa, M'Coy. 



Avicula recta?, M'-Coy. 

 Sanguinolites abdensis, Eth. 

 Bairdia subelongata, J. Sf K. 

 Beyrichia crinita, J. 8c K. 

 — — subarcuata, Jones. 

 Oythere superba, J. 8f K. 

 Leperditia Okeni, Milnst. 

 Eemains of plants. 



Sanguinolites ahdensis is abundant in this bed, and one layer is 

 full of its broken shells. The curious fringed BeyricJiia, B. crinita, 

 is also a common fossil, though not seen at any other horizon. 



This limestone is seen a little to the west of Billow IS'ess. Four 

 miles further east, at the Pans, west of Grail, it reappears, with the 

 black shale, coal, and fireclay underlying it as before. The shale 

 contains the teeth of Diplodus and Otenoptychius, besides the scales 

 of small Ganoids. And the limestone has yielded the following 

 species: — Orthoceras sp., Bellerophon decussatus., Macrocheilus stria- 

 tulus, Murchisonia striatula, M. quadricarinata, Leda attenuata, 

 Modiola divisa, Myalina crassa?, Nucula sp., Sanguinolites abdensis, 

 Beyrichia sp., Leperditia Okeni, and Spirorhis sp. 



About 100 feet of measures intervene. They consist of purple 

 and greyish sandstones alternating with grey and purple shales, 

 enclosing one 6-inch coal and a bed of limestone about 1 foot thick. 

 The only fossils found in the latter are Lepidodendron and some 

 other plants (obscure), the scales of small Ganoids, and coprolites. 

 In a grey shale about 5 feet above the limestone (3168 feet) there 

 are casts of a shell like Anthracosia along with Stigmarian rootlets ; 

 and in a bed of red shale below the limestone (3192 feet) there 

 occur stray and imperfect examples of a shell resembling Myalina, 

 associated with Spirorhis, the scales of small Ganoids, an Entomos- 

 tracan, and Sphenopteris affinis. 



