51 
Some species are very local, being only found within a 
small rocky cove, or else confined to a limited zone on the 
wide sands either at Aberffraw or at Cymmeran, a few even 
are restricted to smaller patches of sand in one of the 
numerous little creeks along the coast. 
Additions to the Molluscci. 
CEPHALOPODA. 
80. Sepia officinalis. The animal is occasionally caught in the 
dredges, nets, and lines of the fishermen, and the bone 
or shell is thrown on shore after a gale. 
81. Sepiola Atlantica, seen at times in the deeper pools of the 
rock. 
82. Octopus vulgaris. This singular animal has been taken, but 
it is very seldom kept, as its uncanny ways make it 
dreaded by the fishermen. 
83. Loligo vulgaris, taken in the nets. It is probably common 
amongst the rocks, as my son saw the inky cloud dis- 
charged from one in a small pool as his boat passed over 
the spot. 
ACEPHALA. 
Fam. I. — Pholadid^, 
84. Teredo norvagica, portions of the tube found in wreck. 
85. Teredo navalis. The tube of this common shipworm is 
found in old wreck floating into the bay, after months of 
drifting in the Atlantic or in the Channel. 
8G. Pholas Candida. Specimens are rare; no doubt the absence 
of limestone rocks along this coast accounts for the 
rarity of the Pholadidse. 
87. Saxicava rugosa. A few specimens. 
88. Mya truncata. A few perfect shells. 
Fam. VI. — AnatinidzE. 
89. Thracia phaseolina. One ralve only. 
