332 GEOLOGY OF BUTE. 



seaward. The cautions given in Arts. 85 and 90 should also 

 be attended to in examining these beds. In this locality 

 Mr. Smith found the following species : 



Cyprina Islandica. Lacuna vincta. 



Astarte Garensis. Modiola modiolus. 



- elliptica. Fusus antiquus. 



- unicostata. Nucula nucleus. 

 Tellina proxima. Leda oblonga. 

 Pecten Islandicus. Saxicava rugosa. 



opercularis. sulcata. 



Natica clausa. Panopjea Norvegica, 



glaucinoides. Mya udevallensis. 



Balanus costatus. truncata. 



Serpula triquetra. arenaria. 



Spirorbis corrugatus. Cardium edula 



Littorina littorea. Sphenia Suainsoni.* 



To these Mr. Crosskey added the following: 



Natica Groenlandica. Margarita unduluta. 

 Mangelia pyi-amidalis. Crenella nigra. 

 var. rosea (Sars). 



This is the best locality for the Panopcea Norvegica and 

 Pecten Islandicus; the latter occurs in large quantities, and 

 perfect specimens are found with northern Balanus attached. 

 One valve of Crenella was found. The boring shetl, Mya 

 udevallensis, occurs in the upright boring position in great 

 numbers. 



Among those who studied the glacial beds wnce Mr. Smith 

 ceased to work entirely among them, the Rev. A. MacBride, 

 of Ardmory, Bute, the Rev. H. W. Crosskey, now resident 

 in Birmingham, and Mr. David Robertson have been the 



* The names are here given according to the original authorities. 

 < 'onchologists will at once perceive that the nomenclature is not 

 uniform. 



