120 Jlmtlj/lical Notices. 



longo-ovata^ margine integerrimo. 5th, Auca gludaUs', testa 

 ovali-elliptica, tenui, villosa, alba, concentrice et transversim 

 striata ; postice rotundata ; umbonibus approximatis ; dentibus 

 siib-obsoletis ; margine integenimo. 6th, Modiola lcevigata\ 

 testa ovali-elliptica, convexa, \irescens, antice obsolete costo- 

 striata, postice rotundata laevigata. 7th, Pecten vitreus ; testa 

 orbicularis, tenuis, hjalina, planulata, lajvissima, lucida, sub- 

 asquivalvis ; auriculis snbequalibus, !a:vibu«. 8th, Balanus §•/«- 

 cialis ; testa subcylindrica, obliqua, albida, obsolete transversim 

 striata; operculo antice profunde transversi"n sulcato, postice 

 irregulariter striato ; apice acuto, inflexo. 



In the paper on Rock Specimens, furnished by Mr. Konig, is 

 the description of a new species of fossil Zoophyte, which he has 

 called Catenipora Panii ; the following are its characters ; C. tu- 

 bulis Grassiusculis, conipressis, collectis in laminas siuuatas varie 

 inter sese coalitas ; tubulorum oriiicies ovatis sa^pe confluentibus ; 

 disscpinientis conferl'ssimis : found by Captain Parry in Prince 

 Regent's Inlet, at the foot of a high hill •,—in transitiun Lime- 

 siune ? 



On FOSSIL SHELLS, 6y Lewis Weston Dillwyn, 

 Esq. F. JR. S.* 



Tilt object of this paper seems to be to draw the attention of 

 Geologists to Fossil Shells as being the most numerous, and gene- 

 rally the best preserved organic remains, and conseciuently the 

 most interesting for geological research. By availing ourselves of 

 certain analogies, proved by the exact conformity in the struc~ 

 ture of many of these fossils with living genera, Mr. Dillwyn 

 thinks some circumstances attending the geological distribution 

 of P'ossil Shells may be observed, which have hitherto escaped 

 notice. The principal ciicumstancc which IMr. Dillwyn has 

 pointed out, is the remarkable paucity of tiie Carnivorous Trache- 

 lipodes in the older beds, from the Transition Lime to the Lias, 

 in which the chambered (Carnivorous) Cephalopoda abound : 

 and judging from the occunence iu such great numbers of the 

 * Philosophical Traiif^actioiis, lH'i3. lu-ad June liit jlh. 



