356 Miscellaneous. 



RARE IRISH MOLLUSCA. 



To the Editors of the Annals of Natural History. 



Windsor Lodge, Monkstowu, co. Dublin, March 16, 1852. 



Gentlemen, — I shall feel much obliged by your publishing the 

 occurrence of the following MoUusca off the Waterford and Wexford 

 coasts in the summer of 1851 : — 



Gastrochcena modiolina ; in limestone boulders, Tramore Bay, co. 

 Waterford. 



Venerupis Irus ; same locality. 



Thracia distort a ; same locality. 



Kellia suborbicularis ; same locality. 



rubra ; among Mytilus edulis on the exposed sides of large 



rocks, Dunmore, co. Waterford. 



Turtonia minuta ; among Lichina confinis at or above high water, 

 Dunmore, co. Waterford. 



Nucula radiata ; in fine sand dredged from about 45 or 50 fathoms, 

 twelve miles off the Hook Light, co. Wexford. 



Trochus Montagui ; off the Saltee Islands, co. Wexford. 



Eulima polita ; dredged in 1 4 fathoms, gravelly bottom, off Port- 

 ally, Dunmore. 



Scalaria Treveliana ; dredged in fine sand in 45 or 50 fathoms, 

 twelve miles off the Hook Light, co. Wexford. 



Odostoma Eulimoides 1 from the same locality as the last. 



Chemnitzia rufescens 1 same locality. 



Natica sordida ; trawled in muddy sand 40 fathoms, off the Saltee 

 Islands, co. Wexford. 



Trophon muricatus ; same locality. 



Ovula patula ; one specimen of a beautiful orange colour in a live 

 state was found attached between the divisions of a specimen of Alcy- 

 onium digitatum, off the Saltee Islands, co. Wexford. 



Bulla scabra ; same locality as Natica sordida. 



Gentlemen, yours truly, 



William White Walpole. 



On the Insects injurious to the Rape Crops. By M. Ad. Focillon. 



The object of the author of this memoir is to furnish the results of 

 his observations, as to the cause of the loss which had been sustained 

 during several years by the cultivators of rape-seed, from the ravages 

 of certain insects. The period at which he commenced his observa- 

 tions (the end of June) was too late in the season to allow time for 

 their completion, and he has accordingly put off till another year the 

 investigation of the natural history of the noxious insects, and the 

 consideration of the best means of destroying them. The problems 

 which he has endeavoured to solve during the present season are the 

 following : — 



