88 THE INVERTEBRATE FAUNA 



the same relation to the species as the 

 variety cc&rulea does to Patella vulgata (M.). 

 This species is common on the shores of 

 the Firth. We have taken it at Aberdour, 

 Wardie, etc. 

 Tectura virginea (Miiller). 



Firth of Forth (M'R, Ed. Mus.) ; Dunbar, 

 at North Berwick living on the rocks at 

 very low water (M.). 



FlSSURELLIM. 



Emarginula fissura (Linn.). 



Firth of Forth (Ed. Mus.) ; empty shells 

 on North Berwick beach (M.). 

 We have found this shell on the beach at 

 Largo Bay. 



CAPULIM. 

 Capulus hungaricus (Linn.). 



Alive off Inchkeith, May 1861 (M'R) ; off 

 Inchkeith (Com. Mar. Zool.) ; small empty 

 shells on North Berwick beach (M.). 

 We have dredged it alive several times in 

 the Firth, Aberlady Bay, 9 fathoms ; and 

 east of Inchkeith, 7 fathoms. We have 

 also found it cast ashore on Portobello 

 beach. 



TROCHID^E. 

 Trochus helicinus (Fabr.). 



Not rare in shell sand at North Berwick 



and Dunbar (M.). 

 T. magus (Linn.). 



I have found a worn shell on Craigroyston 



beach, but I do not suppose that this 



species inhabits the Firth of Forth (M). 

 T. tumidus (Mont.). 



Firth of Forth (M 1 B. } and Ed. Mus^. 



We have taken this species in 7 fathoms, 



off Inchkeith. 



