Messrs Leslie & Herdman on Invertehrata of Firth of Forth. 297 



the same relation to the species as the 

 variety coerulea does to Patella vulgata {M). 

 This species is common on the shores of 

 the Firth. We have taken it at Aberdour, 

 Wardie, etc. 

 Tediira virgvnea (Miiller). 



Firth of Forth {M'B., Ed. Mus.) ; Dunbar, 

 at North Berwick living on the rocks at 

 very low water (if.). 



FiSSURELLIDiE. 



Emarginula fissiira (Linn.). 



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

 on North Berwick beach (if.). 

 We have found this shell on the beach at 

 Largo Bay. 



Capulid^^. 

 Capulus hmigaricus (Linn.). 



Alive off Inchkeith, May 1861 {M'B.) ; 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^. 

 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 {MB., and Ed. Mus). 



We have taken this species in 7 fathoms, 



off Inchkeith. 



