364 BihlloyrujjkicaL Notice. 



iiifera under dcfiuitc zoological names, nothing could be oft'ered to 

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

 graph. M. Terquem first explains the stratigraphical relations of 

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

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

 nor their marls give many Foraminifera. Xext the Fullers-earth 

 Oolites are described according to their locahties over the now 

 touchingly interesting fields between Metz and Longwy, comprising 

 ]iomain, 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, and Keuss 

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

 special objects of the work itself and their puzzling changefuluess of 

 feature. 



III. Deuxihme Serie. Troisieme Memoire sur les Foramini feres dii 

 Systhme oolitJiiqKe, comprenant les genres Frondicularia, Flabellina, 

 Nodosaria, Dentalina, &c. de la Zone a Ammonites Parkinsoni de 

 Fontoy {Moselle). Par M. 0. Terqueji, &c. Mctz, 1870. 



We have not seen the Second Memoir (treating of Cristellaruv') 

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

 Terquem states, it demonstrates the great variabiHty 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 Frondicularia into Limjrdina, or vice versa, 

 according to our views of the degradation or develoi)ment of the 

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

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

 really varietal) group. PI. 23 is half occupied by Lin</idinir, here 

 called Frond icidariiv ; some of them, however, arc reproduced as 

 Linr/idino', by correction, in pi. 2o. In ])1. 23 commences the Fla- 

 belline series of about forty specimens, divided into seven divisions 

 and eighteen species, ^nth careful attention to their individual fea- 

 tures. There is nothing to separate them essentially. 



In figs. 23 & 24 (Fla/nllina a<i(/h((inans) we have a very interest- 

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

 really a sandy species belonging to Te.vtidaria and growing on the 

 Spiro])lectinc plan- — that is, spiral at first and more or less alternate 

 in its segments afterwards. With its terminal aperture it resembles 

 the Textularian Trita.via, Uolostomella, and Bi(/()uriua. It is pro- 

 bably a coarse arenaceous Spirojdccta with terminal a]ierture. It 

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

 Te.vfularia and Litnola. Figs. 20 & 2(5 {Flabellina duhia) is a Va- 

 ginuliniform Litnola, near the Nodosariforra Litnola Sohlani, J. & P. 

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



