OF PLYMOUTH AND THE ENGLISH CHANNEL. 



245 



*HARMOTHOi; IMBRICATA, Linn. 



Not an abundant species, but at the same time fairly common. 

 Mcintosh regards the Channel as very near its limit of distribution, 

 its place being taken in the south by Lagisca Jioccosa. In the 

 neighbourhood of Plymouth it occurs between tidemarks and in 

 deeper water. It is found among broken shells or stones covered 

 with sponges, hydroids, polyzoa, and Ghcetopterus tubes on the Eddy- 

 stone Grounds, and also under laminarian roots and suchlike crevices 

 on the Breakwater. 



Mcintosh (20) gives similar localities, and adds the tubes of Terehella 

 and Chceto])tcrus, and also old shells with Polycirrus. 



Pruvot (29) finds it on the coasts of Brittany, in the Pucus as well as 

 the Cystoseira zones of tidal waters, but he does not notice it in the 

 laminarian zone. 



Mobius (26), referring to the Baltic, finds it among zostera and red 

 algse, also on sand, mud, and muddy sand of various qualities, to a depth 

 of nearly 100 fathoms. Again in the North Sea (27) he adds 10 fathoms 

 to the depth, and as habitat, stones, shells, etc., variously combined with 

 sand, mud, or both. 



Localities. 

 Plymouth : Breakwater, Rum Bay. 

 Eddystone Grounds III. and VII. fine sand ; XVI. shell gravel, [T.V.H.] Allen (1). 



Torbay . 



South Devon . 



Channel Is., Guernsey 



Cotes du Boulonnais 



Dinard . 



Granville, Noir-moutier, and coasts of Brittany 



Rare . 



Under stones and in dredgings 



Cotes de Bretagne 

 St. Vaast 



Littoral zone 



Gosse (10). 

 Johnston (16). 

 Mc Intosh (20). 

 Malaquin (21). 

 de St.-Josej)h (31). 

 Audouin and 



M.-Edwards (2). 

 Pruvot (29). 

 Grube (14). 



f HARMOTHoii RETICULATA, Claparede. 



de St.-Joseph doubtfully refers a mutilated specimen taken near 

 Dinard to this species. 



Pruvot (29) records it from the Pucus zone of tidal waters, the 

 zostera banks on a sandy bottom, stones covered with Cystoseira to the 

 sandy gravel of his laminarian zone. 



Mcintosh (19) considers that this species is in all probability identical 

 with Evarne impar. 



Localities. 

 Dinard (Cezembre) . Dredging . . . de St.-Joseph (31). 



Cotes de Bretagne . . ... Pruvot (29). 



