176 



GAMMARID^l. 



found in close proximity to the broad form previ- 

 ously described [made by Sulcator] ; but occasionally it 

 occurs high up on the beach, and in pools and small 

 hollows between the ripple-ridges. In such situations, 

 however, it is not confined to the bottoms of the hol- 

 lows, but likewise passes up the sides of the bordering 

 ridges/' 



We have also received a specimen from Mr. Robertson, 

 of Glasgow, which was taken by him at Cumbrae, N. B. 



The vignette below is the sketch of Whitburn sands 

 alluded to in the preceding page. 



