Height 6.2 mm. Juvenile from inside cavity of dead barnacle. Menai Strait, March 2011.
Inset at 2X main scale.

1: Patch of wrinkled periostracum. Usually so thin and closely adhering that it escapes notice on adults, and is frequently eroded off.

2: Periostracal fragments on thin, fluted, banded palatal lip.

3: Bristle-like projections of periostracum forming white crest on ribs; regularly occur on juveniles.

4: Narrow spiral ribs with sharp raised adapical edge; might be mistaken for those on some L. arcana and L. saxatilis s.s.

5: Dark spiral lines on ribs (frequent on juv. L. littorea) may cause confusion with nigrolineate forms of L. compressa (but its dark lines are in its grooves).

6: Pure white columellar lip, often has vitreous lustre; distinguishes L. littorea from L. saxatilis and L. arcana (their lips may be off-white or tinted with other colours).

7: Dark patch where banded palatal lip adjoins pure white columellar lip; distinguishes L. littorea from L. compressa.

8. Shell of earliest stage of L. littorea is usually whitish without pigment; survives as whitish apex on later stages unless eroded off.

No full account yet of this species.
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