OF THE FIRTH OF FORTH. 93 



Turritella terebra, var. nivea. 



Not rare on the shore, both east and west 

 from Edinburgh. Specially common to- 

 wards Cramond Island, and on the shore 

 east from Burntisland (M.). 



T. terebra, var. gracilis. 



Granton and towards Cramond Island, not 

 common (M). 



PYRAMIDELLID^:. 

 Aclis unica (Mont.). 



Somewhat rare in fine shell sand on North 



Berwick beach (M). 

 Odostomia risso'ides (Hanley). 



In shell sand, North Berwick (M.). 

 0. risso'ides, var. alba. 



Shell sand, North Berwick (M.). 

 0. rissoides, var. nitida. 



Shell sand, North Berwick (M.). 

 0. risso'ides, var. dulia. 



Shell sand, North Berwick. This species 



is highly variable, and forms occur which 



it is difficult to assign to any of these 



varieties (M.). 

 0. pallida (Mont.). 



Not unfrequent in the shell sand at North 



Berwick (M.}. 

 0. acuta (Jeffreys). 



Occasionally in the shell sand, North 



Berwick (M.). 

 0. acuta, var. umbilicata. 



Not unfrequent in the shell sand, North 



Berwick (M.). 

 0. unidentata (Mont.). 



Somewhat common in the shell sand at 



North Berwick and Dunbar (M.). 

 0. decussata (Mont.). 



Somewhat rare in shell sand, North Ber- 

 wick (M.). 



