﻿RHYNCHONELLA. 



101 



of the ' Synopsis,' has induced both Professor De Koninck and myself to suppose that the 

 author had before him some specimen of B. pugnus ; anyhow it cannot belong to the same 

 species as that which Professor M'Coy describes and figures in 1855, under the denomi- 

 nation of Camarophoria laticliva} 



In 1843 Professor De Koninck had united B. pugnus, and one or two more species, 

 under the single specific denomination of Ter. acuminata ; but at p. 664 of his work on 

 ' Belgian Carboniferous Fossils,' he has corrected the oversight, and referred figs. 3, 3 h and 

 i, of his pi. xviii, to the shell we are now describing. 



Loc. Martin states that the species is common in Carboniferous limestone at Castle- 

 ton, Hope, and Little-Longstone, in Derbyshire. Gilbertson's largest examples appear to 

 have been obtained at Linton, in the Craven district. It is also abundant at Whitewell, 

 Widgill, and Twiston, all situated at a few miles from Clithero. It does not appear to be 

 rare at Kendal, nor in the Isle of Man, &c. 



In Scotland it occurs in several localities of the Lanarkshire and Stirlingshire 

 Carboniferous basins, such as at Hill-head, Campsie, &c. In Ireland, Mr. Kelly mentions 

 Ardagh, Millecent, Little Island, &c. 



It is also a common fossil in many foreign Carboniferous districts ; it occurs at Vise, 

 in Belgium, as well as on the oriental side of the Oural, to the east of Miash, &c. 



Rhynchonella pleurodon, Phillips, Sp. PI. XXIII, figs. 1 — 15, 16 — 22? 



Terebratula mantis, Sowerby. Min. Con., tab. cclxxvii, fig. 1, May, 1821. 



— pleurodon, Fhillips. Geology of Yorkshire, vol. ii, p. 222, pi. xii, figs. 



25—30 (but not 16), 1836. 



— ventilabrum, Ibid., p. 223, pi. xii, figs. 36, 38, and 39, 1836. 



— pentatoma, De Koninck. Animaux fossiles de la Belgique, p. 289, pi. xix, 



fig. 2 (not T. pentatoma, Fischer) in p. 664 ; this mistaken 

 identification is corrected to T. pleurodon, of Phillips, 1843, 

 and 1851. 



Atrypa pleurodon, M'Coy. Synopsis of the Carb. Foss. of Ireland, p. 155, 1844. 



— triplex, M'Coy. Ibid., p. 157, pi. xxii, fig. 17, 1844. 

 Terebratula pleurodon, De Verneuil and Keyserling. Geol. of Russia, vol. ii, p. 79, pi. 



x, fig. 2, 1845. 



— davreuxiana, De Koninck. Animaux foss. de la Belgique, p. 664, 1851. 

 Hemithyris pleurodon, M'Coy. British Pal. Fossils, p. 382 and 441, 1855. 



Spec. Char. Transversely oval, rarely longer than wide, very variable in shape ; 



1 'British Palaeozoic Fossils,' p. 444, pi. iii d, figs. 20, 21. 1 have reproduced in my plate the 

 author's figures, published in 1844 and 1855, so as to enable the reader to form his own opinion upon the 

 subject. 



