CRUSTACEA OF THE CHANNEL ISLANDS. 223 



Crustacea are adapted for swimming ! But thej have lost the sense of 

 vision. 



ISOPODA. 



In this Order again I am not able to do more than note 

 a few Avhich I have been able to identify, but the list might 

 easily be largely extended. When no particular locality is 

 specified, it signifies that the species has occurred in all the 

 Islands, or at least in Jersey, Guernsey and Herm. 



Apseudes talpa, Mont. Tolerably common among Zostera roots, &c., low 

 down in tide range. 



TanaiS VittatUS, Rathke. Fairly common. 



Leptoehelia dubia, Sars. Fairly common. 



Aneeus maxillaris, 2Ioy>t. Common in the lower tide zone Very fre- 

 quently living in colonies in the osculse of sponges. The little Grantia 

 coippressa often has its cavity crowded Avith this crustacean. 



Aniloera meditePPanea, Bate. Generally found parasitic (and always in 

 pairs) on the small Rockflsh Acanthohihrus, fastened by its sharply -hooked 

 limbs to the side of the fish's head, near the eye. ]\Iore rarely on Pollack, 

 Whiting and Bass. Fairly common. 



Aega psOPa, Lin. Parasitic on the Pollack, Bass and Cod. Not common. 



Roeinella DumePillii, Lucas. Rare; sometimes found attached to the 

 Codfish. 



ConilePa eylindPaeea, Mont. Very common. Sometimes on Pollack, &c. 

 Often crowding the bait used in Conger fishing, and even clearing it from 

 the hooks. 



Eupydiee pulehPa, Leach. Common. Occasionally fastening to the skin 

 of bathers in Jersey, and biting unpleasantly. 



SphsePOma sePPatum, Fahr. Very common in dry rock crevices in gravelly 

 situations, living in colonies. Rolls up like a Pill Woodlouse. 



Cymodoeea tPUneata, Leach In the same localities as the last, but gene- 

 rally isolated, and less common. 



Dynamene vepsieolop, Rathke. 



LimnOPia lignOPUm, Rathke. The Gribble. Bores into submerged timber, 

 in company with the Amphipod Chelura terebrans. Very common. 



Nsesa bidentata, Adams. Connnon among dry Fucus, and in rock crevices, 

 up to high Avater mark. 



Idotea tPieuspidata, Leach. Common. Often found in the shrimping- 

 net on sandy ground. 



Idotea lineaPiS, Lin. With the last : common. 



Idotea emapginata, Leach. Rare. 



JaniPa maculosa, Leach. Common under stones in rockpools. 



Jsepa albifpons, Leach. Common ; same situations as the last. 



Munna KPOyePi, Goodsir. Fairly common. 



Ligia oeeaniea, Lin. The Rock Slater. Very common just above high 



water mark on rocks and walls. About an inch and a quarter in length, 



greenish grey, marbled with black. 

 BopyPUS squillaPUm, Latr. A very common parasite on the shrimp, 



l'alf£in< n squiUa, bulging out the side of the carapace like a tumour. The 



male very small, usually found on the branchial lamellae of the female. 



Gyge galatheSB, Bate. On the gills of Galathea squamifera. Not common. 



