﻿8G 



BRITISH CARBONIFEROUS BRACHIOPODA. 



near Settle, in Yorkshire, &c. In Ireland, Mr. Kelly mentions Bundoran, Millecent, 

 Little Island, Lisnaparte, Malahide, and Hook. In Scotland it is found at Brokley, near 

 Lesmahago, at Craiginglen, and at West Broadstone, near Beith, in Ayrshire. On the 

 Continent it was found at Tournay, and Pauquys, in Belgium, by Professor L. de Koninck, 

 M. L'Eveille, and others, &c. 



Athyris globularis, Phillips. Plate XVII, figs. 15 — 18. 



Spinifera globularis, Phillips. Geology of Yorkshire, vol. ii, p. 220, pi. x, fig. 22, 1836. 

 Athyris — M'Coy. British Palaeozoic Fossils, p. 434, 1855. 



Spec. Char. Subglobose ; as wide, or wider than long ; valves almost equally convex ; 

 beak moderately produced, incurved and truncated by a small circular foramen, which is 

 contiguous to the umbone of the opposite valve. The sinus in the ventral valve, and the fold 

 in the dorsal one, commence to appear at a short distance from the beaks, and divide the 

 shell into three lobes of almost equal breadth ; the sinus is of moderate depth, while the 

 fold is more or less elevated. Surface smooth, marked only by a few concentric lines of 

 growth. Shell-structure not perforated. In the interior, the spiral appendages for the 

 support of the oral arms have their extremities directed outwards, and fill the larger portion 

 of the shell. Dimensions variable ; two examples have measured — 



Length 11, width 12, depth 9 lines. 

 9 9 8 



Obs. A. globularis is closely related to both A. ambigua, Sowerby, and to A. subtilata, 

 Hall. Prom the first it may, however, be distinguished by its more globose and uniformly 

 convex appearance, the absence of that narrow median groove or depression in the dorsal 

 valve (so characteristic of Sowerby's shell), as well as by the more regular inflation of the 

 lateral portions of the valves. A. ambigua may be said to be obscurely divided into four 

 lobes, while three would constitute the character of Phillips's species. Prom A. subtilata, 

 A. globularis is principally distinguished by its transverse shape and more clearly defined 

 mesial fold, Professor Hall's shell being longitudinally ovoid, or much longer than wide. 



Loc. A. globularis occurs in the Carboniferous limestone of Bolkmd, Settle, in York- 

 shire, and in several Derbyshire localities. Professor M'Coy states it to be common in 

 the Carboniferous strata of Glasgow, and in that of Craige, near Kilmarnock ; rare in the 

 Carboniferous limestone of Dalmellington, Ayrshire, but whence I have not seen any 

 well-authenticated specimens. On the Continent it has been found in the Carboniferous 

 limestone of Vise, in Belgium, by Professor L. de Koninck. 



Athyris subtilita, Ball. Plate I, figs. 21, 22. Plate XVII, figs. 8—10. 

 Athyris gregaria, M'Coy. British Palaeozoic Fossils, p. 435. 

 Obs. At p. 18 of this monograph, I described the shell here named as Terebratula (?) 



