NORTH BRITISH TESTACEA. 



377 



LlGULA. 



2. praetenuis. 



3. distorta. 



4. Boysii. 



5. prismatica. 



6. compressa. 



7. tenuis. 



M. D. Portobello Sands, scarce. 

 M. Dunbar. 



M. Portobello Sands, not un- 

 common. These speci- 

 mens are thicker than 

 those on the southern 

 shores. 



M. New shell found by me on 

 Belton Sands, near Dun- 

 bar ; and also on Porto- 

 bello Sands, not uncom- 

 mon. 



D. M. Shore of Leith. 

 M. Musselburgh, common at 

 times. 



SOLEN. 



Animal an Ascidia. Shell bivalve, oblong, open 

 at both ends, furnished with a reflex subulated 

 tooth, often double, not inserted into any groove 

 in the opposite valve. 



1. siliqua. P. D. M. Dunbar; and in great plen- 



ty on the sandy shore of 

 Aberlady Bay. 



2. ensis. P. D. M. On the same coasts, not un- 



common. 



3. pellucidus. P. D. M. Portobello Sands. At times 



rather plentiful, and of a 

 large size. 



4. fragilis* M. Shore near Dunbar, scarce, 



