594 E. J. ALLEN. 



THE YEALM ESTUARY. 



A sheltered estuary to the east of Plymouth, where a large body of 

 pure sea-water extends for a considerable distance from the mouth, and 

 the fauna is essentially marine. 



OUTSIDE GROUNDS. 



Sliores. 



Wembury Bay. A rocky shore, with intervals of sand. Some of the 

 reefs give considerable shelter from the breakers, especially at the 

 western side of the bay. 



Reny Rocks. A reef of exposed, weed-covered rocks running from 

 the Shagstone to the mainland. 



Whitsand Bay. An exposed shore which consists chiefly of fine, 

 shifting sand, with occasional rocky patches. 



Dredgmg and Trawling Grounds. 



Cawsand Bay. Depth 3-5 fms. An inshore, shallow, sheltered bay 

 with a bottom of fine sand. 



Whitsand Bay. Depth 4-8 fms. A shallow sandy bay, more exposed 

 than Cawsand Bay. 



Mewstone Ledge. Depth 10-15 fms. A ridge of soft red, con- 

 glomerate rock, free from growth of seaweed. The dredge breaks off 

 portions of the rock. 



Mewstone Shell Gravel and " Amphioxns " Ground. Depth 

 10-12 fms. Bottom of clean shell gravel. 



Stoke Point Grounds. Depth 10-22 fms. Reefs of red conglomerate 

 alternating with patches of gravel and sand. 



Rame-Eddystone Grounds. Depth 25-30 fms. Trawling ground 

 between Rame Head and the Eddystone. Bottom muddy gravel, with 

 clean sand in places. 



Looe-Eddystone Grounds. Depth 25-30 fms. An extension west- 

 wards towards Looe of the Rame-Eddystone Grounds. Bottom similar 

 to that of the latter, but rougher. 



Eddystone Grounds. Depth 28-35 fms. Bottom varied. They are 

 fully described in this Journal, vol. v., p. 365. 



