GO 
One specimen, on the carapace of the edible crab, was taken, about 
one mile east of S. Mary’s Isle. 
Note.— See also present report, p. 40.— A.M. 
Family — Pectenid.e. 
Genus — Pecten. 
P. pusio, Linn. 
P. distortus, Da Costa. 
Common, on every part of the coast. 
P. v abius, Linn. 
I have only obtained one living specimen, taken with several 
P. opercularis, 18 miles off Seaham Harbour, 
P. opercularis, Linn. 
Common, in the coralline zone everywhere. They vary in 
colouring. 
P. TIGRXNUS, Mull. 
Frequent, everywhere. 
P. maximus, Linn, (the common scallop). 
Not common, except in the north of the county, in deep water. 
F amily — Mytilidte . 
Genus — Mytilus. 
M. edulis, Linn, (the common mussel). 
Common. Near Cullercoats it generally devolves, probably 
because of its environment, into the var. incurvata (M. incurvatus, 
Penn.) 
M. modiolus, Linn. 
Not uncommon, on the muddy ground off the River Tyne. 
F amily — A rcid.e. 
G enus — N ucula. 
N. nucleus, Linn. 
Not common. 
Fam ily — Kelliid.e . 
Genus — Kellia. 
K. SUBORHICULARIS, Mont. 
I have only found one or two young ones in holes excavated by 
Saxicava rugusa at Cullercoats. 
Family — Lucinid.e. 
Genus — Lucina. 
L. borealis, Linn. 
Common, on all parts of the coast. 
