364 Bibliographical Notice. 



nifera under definite zoological names, nothing could be offered to 

 the student of more practical value than this interesting little mono- 

 graph. M. Terquem first explains the stratigraphical relations of 

 the Bajoeian Oolites near Metz : (1) ferruginous limestone below, 

 and (2) coralline and subcompact limestones above ; neither these 

 nor their marls give many Foraminifera. Next the Fuller's-earth 

 Oolites are described according to their localities over the now 

 touchingly interesting fields between Metz and Longwy, comprising 

 Remain, Thionville, Gorze, Gravelotte, and especially Fontoy, where 

 the marls are exceedingly rich in Foraminifera. A review of various 

 classifications of, and works on, Foraminifera follows, those of De 

 Haan, Lamarck, D'Orbigny, Dujardin, Schultze, Claparede, andEeuss 

 being chiefiy treated of, by way of introduction to the study of the 

 special objects of the work itself and their puzzKng changefulness of 

 feature. 



III. Deuxi^me Serie. Troisieme Memoire sur les Foraininiferes dtt 

 Systeme oolifJiique, compvenant les genres Frondicularia, Flabellina, 

 Nodosaria, Dentalina, &c. de la Zone a Ammonites Parkinson! de 

 Fontoy {Moselle). Par M. 0. TERauEM, &c. Metz, 1870. 



We have not seen the Second Memoii' (treating of Gristellarice) 

 of this Second Series ; but we can readily understand that, as M. 

 Terquem states, it demonstrates the great variability and instability 

 of species, showing that in certain forms the shape of the shell, and 

 even the ornament, changes not only among individuals, but often 

 even on the two faces of the same specimen. Seven clear and well- 

 filled plates (pis. 22-29) illustrate this Third Memoir; and they 

 are highly worthy of attention. PL 22 contains thirty forms illus- 

 trative of the passage of Frondicidaria into Lingidina, or vice versa, 

 according to our views of the degradation or development of the 

 individuals. They^ass under the name " Frondicidaria," in accord- 

 ance with the author's explanatory remarks on this (subgeneric or 

 really varietal) group. PL 23 is half occupied by Lingulince, here 

 called Frondiculance ; some of them, however, are reproduced as 

 Lingulince, by correction, in pi. 25. In pi. 23 commences the Fla- 

 belline series of about forty specimens, divided into seven divisions 

 and eighteen species, with careful attention to their individual fea- 

 tures. There is nothing to separate them essentially. 



In figs. 23 & 24 {Flabellina agglutinans) we have a very interest- 

 ing Foraminifer, which, though apparently FlabeUine in shape, is 

 really a sandy species belonging to Textidaria and growing on the 

 Spiroplectine plan — that is, spiral at first and more or less alternate 

 in its segments afterwards. With its terminal aperture it resembles 

 the Textularian Tritaxia, Holostomella, and Bigenerina. It is pro- 

 bably a coarse arenaceous Spiroplecta with terminal aperture. It 

 might, however, be Lituoline in structure, a meeting-point of 

 Textidaria and Lituola. Figs. 25 & 26 {Flabellina dubia) is a Va- 

 ginuliniform Lituola, near the Nodosariform Lituola Soldani, J. & P. 

 This also is of great interest. Figs. 27-30 are the common, variable, 



