﻿ATHYRIS. 



83 



us with a figure of his species, and that his description — " orbicular, depressed ; beak of 

 the lower valve prominent but small; surface strongly radiated and concentrically imbri- 

 cated," might be applicable to this or to other species, I am able to assert, from the 

 inspection of the original example in the author's possession, that T. fimbriata, Phillips, 

 cannot be placed among the synonyms of A. expansa, but would be more properly located 

 with those of A. Royssii. 



I am also quite of Professors M'Coy and De Koninck's opinion, while stating that 

 A. fimbriata, figured by Mr. J. de C. Sowerby in the ' Mineral Conchology,' has been drawn 

 from a specimen of Phillips's A. expansa ; and it is likewise certain that some examples 

 labeled and described as A concentriea (Buch), by Professor M'Coy, belong to the species 

 we are now describing. Sp. expansa appears to have been subject to much malformation 1 

 if we are to judge from the number of specimens in that condition which abound in 

 certain localities. 



Loc. Common at Kendal, Westmoreland ; Settle, in Yorkshire ; at Bolland, and in 

 the lower Carboniferous limestone of Hittor-hill, and Longnor, in Derbyshire, &c. In 

 Ireland Mr. Kelly mentions Bruckless, Drumdoe, and Milverton. I am not acquainted 

 with any Scottish examples. 



Athyris squamigera, Be Koninck (?). Plate XVIII, figs. 12, 13. 



Martinia phalcena, M'Coy. Synopsis of the Carboniferous Fossils of Ireland, p. 140, 

 1844. (Not Spirifera phalcena of Phillips's 'Figures and Descrip- 

 tions of Palaeozoic Fossils,' p. 71, pi. xxviii, fig. 123, 1841.) 



Terebratula squamigera, De Koninck. Animaux Fossiles du terrain Carbonifere de la 



Belgique, p. 667, pi. lvi, fig. 7, 1851. 



Spec. Char. Transversely oval, much broader than long ; valves convex, sometimes 

 gibbous ; beak moderately produced, incurved, and truncated at its extremity by a small 

 circular aperture. In the dorsal valve there exists a prominent mesial fold, and in the 

 ventral one a sinus of variable depth, both commencing at a short distance from the 

 extremity of the beaks. External surface ornamented with small imbricated striae ; inte- 

 riorly there exists two spiral appendages, with their extremities directed outwards. Two 

 specimens have measured — 



Length 12, width 22, depth 9 lines. 

 >j 8, ,, 16, 7 ,, 



Obs. On comparing the specimen identified by Professor M'Coy as Martinia phalcena 

 (our fig. 13) with Phillips's Devonian Spirifera phalcena, I was soon convinced that they 



1 Two of these specimens in the Museum of Practical Geology measure — 

 Length 23, breadth 33, depth 7 lines. 



