1857-] WRIGHT LIAS FOSSILS FROM SKYE. 31 



the Gloucestershire forms of the same size found in the shales of the 

 Middle Lias, and in the Marlstone of that county. 



Lima gigantea, Sowerby, 1814. 



Plagiostoma giganteum, Sow. Mineral Conchology, t. 77 ; Zieten, 

 die Versteinerungen Wiirttembergs, t. 51. f. 1, 1830. 



Lima gigantea, Goldfuss, Petrefact. Germaniae, t. 101. f. 1, 1834. 



The specimen from Pabba agrees so well with the small smooth 

 forms of this species found in the Lower Lias of Gloucestershire and 

 Lyme Regis, that I have referred it to L. gigantea. As I believe 

 that L. gigantea does not occur in the Middle Lias, I think it pro- 

 bable that this specimen was obtained from some of the lower beds. 



Lima Hermanni, Zieten, 1838. 



Lima Hermanni, Zieten, die Verstein. Wiirttemb. t. 51. f. 2. 



The specimen is a fragment, but the large ear, the flattened shell, 

 the waved ribs with wide interspaces, and the distinct concentric 

 layers of growth are sufficient to distinguish this fragment from its 

 congeners. It was collected from the Pabba-shales. 



Limea acuticosta, Goldfuss, 1836. 



Limea acuticosta, Goldfuss, Petrefact. Germanias, t. 107. f. 8. 

 Plagiostoma acuticosta, Quenstedt, der Jura, t. 18. f. 22-25. 



This species is catalogued in Murchison's Geology of Cheltenham 

 as Plagiostoma duplicatum ; it is found in the Marlstone and Middle 

 Lias shales of Gloucestershire. It is collected likewise in the same 

 zone at Robin Hood's Bay, Yorkshire. In France it is found at 

 Fontaine-Etoup-four, Calvados, in the Middle Lias. It is abundant 

 in the Middle Lias of Swabia. The two characteristic specimens of 

 this shell before me, contained in fossiliferous nodules, were collected 

 from the Pabba-shales. 



Inoceramus ventricosus, Sowerby, 1823. 



Crenatula ventricosa, Sowerby, Mineral Conchology, t. 443. 

 Inoceramus nobilis, Minister in Goldfuss, Petr. Germanise, t. 109. 

 f. 4. 



This species is very abundant in the Middle Lias near Cheltenham ; 

 a solitary specimen from the Pabba-shales agrees entirely with our 

 shells ; the regular undulations on the sides, and the general con- 

 tour of the mould, are identical with fossils of the same size from 

 Hewlett's Road near that town, where it occurs with Ammonites 

 Henleyi, Sow. At Charmouth, Dorset, Dr. Oppel collected it with 

 Ammonites Davcei, Sow. 



Pecten jEQuivalvis, Sowerby, 1818. 



Pecten cequivalvis, Sowerby, Mineral Conchology, t. 136. f. 1. 



The specimens of this species from the Pabba-shales are small and 

 mostly in the state of moulds. There is one large compressed shell 



