MEMORANDUM. 53 



gives the name Grcenlandicum among those of the species obtained by him from 

 the pebbly sands at Southwold. Astarte sulcata, Ostrea edulis, and Pleurotoma 

 turricula are also given by Mr. C. Reid as having been found by him in these sands 

 on the Cromer coast. 



IN THE MIDDLE GLACIAL. ffydrobia ulvce. A specimen of this shell was found by 

 Mr. Harmer at Lound, near Yarmouth, in association with some of the commoner 

 species of this deposit. 



IN THE MARCH GRAVEL. Tellina lata. A small specimen of this shell from March 

 is in the Cambridge Museum. Mr. Harmer has found the freshwater shell, Cyrena 

 fluminalis, in numbers in this gravel, associated with Gardium edulis and other 

 marine shells; an asociation corresponding to that which occurs in the Hessle 

 gravel at Kelsea Hill in Yorkshire. 



