20 THE BRITISH WOODLICE, 
Ligia oceanica Linne (The Quay-louse). Pirate I. 
1767 Oniscus oceanicus Linné (43), p. 106r. 
1793 Cymothoa oceanica Fabricius (26), p. 509. 
1815 Ligta scopulorum Leach (38), p 374. 
1868 Ligta oceanica Bate and Westwood (t), p. 444. 
1898 Ligia oceanica Sars (59), 156, pl. LXX. 
There is but one British species of Ligia, and this, the 
largest member of the whole tribe to be met 
with in these Islands, usually attains a length 
of two centimetres, while adult males may be 
nearly half as long again. It is the Oniscus 
oceanicus of Linnzeus and lives on the sea shore, 
where it may be found at low tide beneath stones 
and rubbish in the crevices of timber. Ligia 
forms a connecting link between the woodlice 
proper and the many Isopods which actually 
live in the sea. 
The colour of the animals is a greenish grey, 
and the compound eyes are almost black, so 
that they are very conspicuous; there are from 
eleven to fourteen joints to the flagellum of the 
outer antennae and this feature, taken in con- 
AND Den eepuncomme junction with the: laree .size and whabitatans 
ieror Ligia oceanica. sufficient to identify the species in question. 
On the coast of Essex the name ‘“ quay- 
lowders” is given to these crustaceans, “lowder” being 
apparently an old plural of louse. 
It is worthy of mention that Mr. Webb, when in charge of 
the Marine Biological Station at Brightlingsea, examined a 
very large male specimen of Ligia oceanica, in which the maxille 
were duplicated and consisted of four pairs instead of two. 
BRITISH LOCALITIES:— 
England: Brightlingsea; (W.M.W.): Maldon; (W.M.W. 
from R.M.): Southend; (J.A.M.): Whitstable; (W.M.W.); 
Herne Bay ; Margate; Dover; Folkestone; (J.A.M.) 
Scotland : Shetland to Cornwall; (Norman, 49). 
Iveland: East Coast; West Glengariff; Castletown; SBere- 
haven ; Bundoran ; (Scharf, 63). 
FOREIGN DISTRIBUTION:— 
Europe: France; (25); Spain: (12): Denmark, Prussia, Norway, Faroe 
Islands, Belgium ; (50). 
Africa: Morocco; (16), 
