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 ddbris from the coralline ground and in the 

 stomachs of haddocks. 



Fam. Idoteida. 

 Genus Idotka, Fab. 

 Idotea tricuspidata, Desmarest ; B. & W. op. cit. ii. p. 379. 

 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 Cymodoceu 

 truncata, Mont, from St. Andrews; but this is doubtful. The 

 specimens probably came from the Outer Hebrides. 



