CUMMING ON THE ISLE OF MAN. 34?7 



Patella vulgata. 

 Turritella terebra. 

 Fusus Bamfius. 



scalariformis. 



antiquus. 



cinereus*, Soy. (An American species, according 



to Mr. G. B. Sowerby.) 

 A variety of the same, or possibly a distinct species. 

 Pleurotoma turricula. 

 Murex erinaceus. 

 Buccinum undatum, var. tenerum. 

 A variety of Buccinum undatum ? resembling Nassa reti- 



cosa. 

 Purpura lapillus. 



DESCRIPTION OF THE PLATES. 



Plate XIV. 



1. General Map of the Isle of Man, corrected by the Author, and geologically 

 coloured. 



[In this map the beds are coloured to the outer line, which represents the coast 

 at low water.] 



2. General Section across the south-western part of the island from Lhergydoo, 

 north-east of Peel, to Langness Point, south-east of Castletown. 



Plate XV. 



Geological Map of the limestone basin, and other parts of the Southern district 

 of the island, as it is supposed they would be seen if denuded of the tertiary for- 

 mations. This map exhibits the relations of the Carboniferous series to the older 

 PaljEozoic formations, together with the undulations caused by the intrusion of 

 igneous rocks and the principal axes of distm-bance. 



Plate XVI. 



1. Ground plan (geologically coloured) exhibiting the details of the coast from 

 Ronaldswaynear Derby Haven to Coshnaliawin at the mouth of the Santon River, 

 and marking the position of the faults, cracks and axes of disturbance connected 

 with the elevation of the iirough and the formation of a scries of bosses along one 

 of the lines of disturbance. 



2. Section exhibiting the contorted limestones and trap at Scarlet Stack near 

 Castletown. 



This is Mr. Strickland's Fmm Furbesii. 



