Miscellaneous. 157 



Mollusca dredged in Cork Harbour during the Summer q/^ 1 85 1 . 

 By Samuel Wright and J. Carroll. 



Sph(Bnia Binghami, Turt. Several perfect examples. 



Thracia villosiuscula, Macg. Rather frequent. 



T. puhescensy Pult. 



Tellina pygmcea^ Philippi. 



Astarte triangularis^ Mont. (sp.). A few dead specimens. (Also 

 in shell-sand from Kilkee, J. Wright.) 



Cardium fasciatum, Mont. Frequent. 



C. pygmceum, Don. Frequent. 



Lucina spinifera, Mont. (sp.). A single living example. 



Montacuta ferruginosa, Mont. (sp.). 



M. bidentata, Mont. (sp.). 



Kellia rubra; Mont. (sp.). 



Lepton squamosum, Mont. (sp.). Odd valves frequent: two young 

 living specimens occurred. 



Nucula nitida, Sowerby. 



Rissoa striatula, Mont. (sp.). Dead. 



R. vitrea, Mont. (sp.). Several dead individuals. 



R. proxima, Alder. 



R./ulgida, Adams (sp.). One dead example. 



C cecum glabrum, Mont. (sp.). 



Cerithium adversum, Mont. (sp,). A few perfect specimens. 



Scalaria clathratula^ Mont. (sp.). Common. 



Chemnitzia rufescens, Forbes. One dead example. 



Odostomia obliqua, Aid. Dead. 



Mangelia teres, Forbes. Dead. 



M. gracilis, Mont. (sp.). Two dead individuals. (We dredged in 

 the same locality a line living specimen in June 1850.) 



Cylichna nitidulay Loven. 



C. strigella, Loven. 



These rare Cylichnce, vi'iih. Chemnitzia rufescens, Odostomia obliqua, 

 Astarte triangularis, and Mangelia teres, appear to have been washed 

 into our harbour from deep water. 



Ccecum trachea, Mont. (sp.). Youghal, J. Wright. | 



Rissoa soluta, Forbes and Hanley. In shell-sand from Bantry, 

 1850; S.Wright. 



On the General Cavity of the Body of Invertebrate Animals. 



By M. A. DE QUATREFAGES. 



In this memoir, M. de Quatrefages seeks to give a clear and distinct 

 idea of the mode of disposition of the organs in the bodies of Inver- 

 tebrata, and of what is understood by the general cavity in these 

 animals. According to him, by general cavity «iust be understood 

 the more or less circumscribed, more or less free space contained 

 within the walls of the entire body and in which the internal organs 

 are enclosed. This general cavity, indistinctly marked in the superior 

 animals in which it is filled with various organs, acquires great im- 



