﻿250 H. Etheridge^ Jim. — Contributions to British Palwontology. 



Prof. M'Coy's description of 0. cylindraceum, Flem. (non Sow.)/ 

 with the exception of the waved septa, would almost embrace our 

 species ; on the other hand, it does not correspond with Fleming's 

 original figure,- or with the specimen from which this was drawn, as 

 I have (through the kindness of Dr. Traquair) ascertained by an 

 inspection of it in the '•' Fleming Collection," Museum of Science 

 and Art, Edinburgh. Both in 0. cylindraceum, Flem., and O. 

 attenuatum, Flem. (non Sow.), the septa are much more numerous, 

 and the intervals between them relatively too broad for their height. 



On the whole, I think we may consider 0. Brownianum as closely 

 allied to 0. calamus, de Kon. 



Loc. and Horizon, — Bed F, or Ardross Limestone, of the Eev. T. 

 Brown, on shore east of Ardross Castle, near Elie, Fife. This so- 

 called limestone consists of three bands of an impure limestone 

 separated by thin shales, and is well displayed on the beach at high- 

 water mark, at the above locality. The Kev. T. Brown, in his 

 paper before alluded to, speaks of these bands collectively as one, 

 and places it as the lowest of six limestones near the base of what 

 we usually call the Carboniferous Limestone Series. According, 

 however, to Mr. Brown's explanation of the geology of this part of 

 Fife, the Ardross Limestone will be some 1400 ft. above the base of 

 this series, the 1400 ft. in question being taken from the upper part 

 of Mr. Maclaren's Calciferous Sandstone Series (= L. Carboniferous), 

 and tacked on to the hitherto supposed base of the Carboniferous 

 Limestone Series.^ The Geological Survey Map of this part of 

 Fife * by Mr. Howell, represents the patch in which this limestone 

 occurs as Lower Carboniferous (Cement-stone Group). I have much 

 l^leasure in naming this Orthoceras after the Eev. Mr. Brown, to 

 whom I am indebted for the loan of the figured specimen, and 

 information relating to the Fifeshire coast. 



EXPLANATION OF PLATE XII. 



Fig. 1. — Pecten Sowerhii, M'Coy ; nat. size. Cement Stone, L. Carb. Limestone 



Group. Brewsterland Quarry, E. Kilbride. Cabinet of Mr. A. Patton. 

 ,, 2. — The same ; nat. size. L. Carb. Limestone Group, Merry and Cuning- 



hame's Iron and Limestone Pit, near Carluke. Coll. Geol. Survey of 



Scotland. 

 ,, 3. — The same ; nat. size. Shale above No. 1 Limestone, L. Carb. Limestone 



Group, Whitfield Old Quarry, near MacbieMU Station, Peeblesshire. 



Coll. Geol. Survey of Scotland. 

 „ 4. — Aviculopecten papyraceus, Sow. ; nat. size. Lower Coal-measures, Lanca- 

 shire. Coll. Mus. Pract. Geology, London. 

 ,, 5. — The same. Various forms of the ribbing, magnified. 

 „ 6. — Anthracomya Phillipsii, Will. ; nat. size. Coal-measures, Bradford. 



Cabinet of E. W. Binney, Esq. 

 „ 7. — The same; nat. size. Coal-measures, Ardwick. Cabinet of Prof. W. C. 



Williamson. 

 „ 8. — A. Scotica, E. Eth., jun. ; twice nat, size. Cement-stone Group, L. 



Carboniferous, Mid Calder. Coll. Geol. Survey, Scotland. 

 „ 9. — Slab showing crushed specimens of SamjuinoUtes ? Abdenensis, R. Eth., 



jun. ; nat. size. L. Carb. Limestone Group, Abden, near Kinghorn. 



' lirit. Pal. Foss., p. 569. 



2 Annals Phil. 1815, vol. v. p. 202, t. 31, f. 3. 



3 Brown, I.e., p. 391. * Sheet 41, Scotland. 



