Hil CARBONIFEROUS LAMELLIBRANCHIATA. 



occur ; fossils of any kind are rare in them, and prior to the appearance of a true 

 Mountain Limestone bed are merely traces of plants. The shales nearer to Pettigo 

 contain true Carboniferous fossils, Producta pustulosa, etc.; and among them the 

 apparently new species, ' Lueina Bu Noyeri.' " I quote this at length, as it is 

 important if the Carboniferous age of the bed should be called in question. 



NOTES ON CERTAIN GENERA AND SPECIES. 



Modiola megalcba. — I have grave doubts as to the genus of this species. The 

 interior of the valve and the small lobular anterior end seem to point rather to an 

 affinity with Naiadites than with Modiola. I am of opinion that the locality at 

 Foynes Island is much below the Coal Measures, and should rather have been 

 given as the lowest part of the Pendleside series in Ireland. 



Modiola Macadamii has a much wider horizontal distribution than I gave, 

 occurring in the Calciferous Sandstone series of Roxburghshire and Fife. 



Genus Parallelodon. — Mr. H. "Woods points out in ' Ann. and Mag. Nat. Hist.', 

 ser. 7, vol. iii, p. 47, that the genus Grammatodon was founded by Meek and 

 Hayden in 1860 for a species of Area of Jurassic Age. There was a reference to 

 the type, but no description was given until 1864. Mr. Woods considers that 

 Grammatodon is synonymous with Macrodon, Lycett, which, having been used for a 

 genus of fishes, could not stand ; de Koninck, Whidborne, and I adopted Par- 

 allelodon, M. and W., 1866; but if Mr. Woods is correct, Grammatodon has the 

 priority over Parallelodon, and should be substituted. 



Nucula lasvirostris, Portlock sp., should be referred to the genus Gtenodonta, and 

 I consider G. sinuosa, de Koninck, to be a synonym of this species. It is probable 

 that N. undulata, Phill., should also be referred to Gtenodonta, but until I have 

 examined the hinge-plate I cannot be oertain that this is the case. 



Protoschizodus magnus, de Koninck. — An examination of his types showed me 

 that de Koninck had described this species also under the name of Rutotia lenticu- 

 laris. This name should, therefore, be placed as a synonym of the former species. 



Wdmondia oblonga. — The specimen figured, Vol. I, PL XXIX, fig. 4, belongs 

 to this species and not to E. Lyellii. 



Gardiomorpha obligua, Hind, appears to be a synonym of C.Nysti, de Koninck, 

 and the latter name must therefore be retained. 



MytUimorjaha angulata, Hind, proves to be identical with Sanguinolites angulata, 

 de Koninck ; consequently his name, not mine, should be given as the author of the 

 species. Fortunately, the marked character of the shell induced us both to give it 

 the same specific name, which thus remains unchanged. 



