CRUSTACEA. 
151 
Genus Janira, Leach. 
Janira maculosa, Leach ; B. & W. op. cit. ii. p. 338. 
Frequent on shells and Filigrana from the coralline ground, 
and under stones in pools near low water at the East and other 
rocks. This species has many of the habits of Idotea. 
Genus Limnoria, Leach. 
limnoria lignorum, Rathke; B. & W. op. cit. ii. p. 351. 
Abundant in the stakes for the salmon-nets on the West 
Sands, and in wood elsewhere. 
Fam. Arcturidse. 
Genus Arcturus, Latreille. 
Arcturus longicornis, Sowerby ; B. & W. op. cit. ii. p. 365. 
Common in the stomachs of cod, haddock, and flounders. 
Arcturus gracilis, H. Goodsir ; B. & W. op. cit. ii. p. 373. 
Abundant in debris from the coralline ground and in the 
stomachs of haddocks. 
Fam. Idoteidse. 
Genus Idotea, Fab. 
Idotea tricuspidata, Desmarest; B. & W. op. cit. ii. p. 37U. 
Frequent near low water in the laminarian region, and in 
the stomachs of all the common fishes. 
Idotea linearis, Pennant; B. & W. op. cit. ii. p. 388. 
Common in 3 or 4 fathoms on sand near the bar of the 
Eden, in the trawlers’ boats, and in the stomachs of the 
common fishes. They are active swimmers. 
Messrs. Bate and Westwood state that I sent Cymodocea 
truncata, Mont., from St. Andrews ; but this is doubtful. The 
specimens probably came from the Outer Hebrides. 
