CYPRIDINA. 13 



to the figure and description in the ' Syn. Char. Carb. Foss.'), being If by f Hne (a Hne 

 = To inch). 



Figs. 24 — 27 are brown bivalved carapaces from Braidwood, Carluke, Lanarkshire. 

 They were found by Mr. John Young, amongst about 300, in a fish Coprohte,^ collected 

 by Dr. D. R. Rankin in an old " Opencast " at Braidwood Gill, Carluke, from a stratum 

 containing Beyrichia miiUilobata, in the Lower Limestone Shale, and on or below the 

 horizon of the First Calmy Limestone, 343 fathoms below the Ell Coal of the Carluke 

 series. The Coprolite was about two inches by one in size and thickly charged throughout 

 with the bivalve tests. 



Smallest. — Length yj ; height -^ ; thickness ? . Proportions 3^ : 2. 



Largest.— „ \\ „ I; „ ^. „ 9 : 6 : 4. 



Fig. 28 is from a cast in the Permian Limestone of Sunderland ; there are two 

 specimens in Mr. Kirkby's Collection. It closely resembles C. primava in outline and 

 contour, and is about -^ inch in length. 



We have also met with this species in the Poolvash Limestone of the Isle of Man (see 

 p. 22). 



So many of our fossil Entomostraca have been derived from the Carboniferous 

 Formations of Scotland, particularly of Lanarkshire, by the energy and kind care of 

 Dr. Rankin, Messrs. Grossart, Young, Armstrong, Thomson, Hunter, Robertson, and 

 other friends, that we will here refer to sources of information on the stratigraphy of the 

 Scotch Coal-fields. 



At pages 33 and 34 of the ' Monograph of the Fossil Estheriae " (Pal. Soc), 1862, is 

 a stratigraphical list of the Coal-measures of Lanarkshire, indicating the range of 

 Beyrichia, Estheria, and Leperditia (there termed " Cytheropsis "). Mr. Grossart's 

 Cypridina (350 fathoms below the Ell Coal) is also referred to at p. 34, and Dr. Rankin's 

 specimen (239 fathoms) at p. 35. 



A Synoptical Table or " Vertical Section of the Carboniferous Rocks in the neigh- 

 bourhood of Glasgow, showing the distribution of the Bivalve Entomostraca," was 

 published in the ' Trans. Geol. Soc. Glasgow,' vol. ii (1867), p. 225; and it was re- 

 issued in an improved form in the Supplement of vol. iii, 1871, by Messrs. John Young 

 and James Armstrong, descriptive of the vertical range and distribution of the Car- 

 boniferous Fossils of the West of Scotland. 



A Tabular View of the Carboniferous System of Lanarkshire was given by Mr. T. 

 Davidson, F.R.S., in the ' Geologist,' vol. ii, 1859, p. 466; and of the Lothians in the 

 'Geologist,' vol. iii, 1860, p. 239; and a still later conspectus of these Carboniferous 

 Formations of East Scotland, by Mr. Geikie, was pubhshed in Murchision's ' Siluria,' 

 1867, p. 292, &c. See also the publications of the Geological Survey of Scotland. 



^ Mentioned also in the "Report of the Glasgow Geological Society's Meeting of January 25, 1866," 

 in the 'Geological Magazine,' vol. iii, p. 133. 



