V 

 Reviews — Dr. Egger's Foraminifera. 229 



the Endocyclical over the Esocyclical Echinoids in the Portuguese 

 Jurassic. 



The different forms are fully illustrated in the accompanying tea 

 lithograph plates, and we may congratulate the Geological Survey 

 of Portugal on t'ne satisfactory manner in which it has published 

 this monograph. 



II. — Eeport on the Foraminifera dredged by H.M.S. "Gazelle," 

 DURING THE Years 1874-76. By Dr. J. G. Egger, etc., etc. 

 With one Chart and 21 pages of figures. 4to. Munich, 1893. 

 [Foraminiperen aus Meeresgrundproben, etc. Abhandl. k. 

 bayer. Akad. Wiss., ii.Cl., xviii.Band, ii.Abtheil.] 

 ~]Vr EARLY all the Foraminifera, from Nummulites downwards, 

 Jli are of interest to Geologists ; for in many instances they go 

 far to constitute the mass of rock ; and often their particular forms, 

 or the general facies of a series, characterize certain groups of strata. 

 For instance, the special Carboniferous Endothyr^ and Fusulinge, — 

 the poor breed of Nodosaria3 and Cristellarias in the Lias and Oolites, 

 — the manifold arenaceous species in the Jurassic clays, — the well- 

 grown Nodosariaj and Cristellariaa of the Cretaceous formations, — the 

 distinctly-various Loiver-Tertiary Nummulites, — the Polymorphinae 

 of the Lower Crag, — and the large Nodosarige and Cristellarice in 

 the Upper Tertiaries of Italy. Some such groups are met with in 

 existing seas ; and other groups of living Foraminifera dominate 

 here and there. 



This fact is well shown in Dr. Egger's Report on the deep-sea 

 Foraminifera obtained by H.M.S. " Gazelle," sent out by the German 

 Government in 1874. The scientific results of this voyage were 

 published in 5 vols. 4to. Berlin, 1888-90, excepting this Report, 

 which has been communicated to and published by the Munich 

 Academy of Sciences. 



Precise economy has been practised in the production of text and 

 plates. For the nomenclature and synonomy the reader is referred, 

 for the most part, to Dr. H. B. Brady's Report on the Foraminifera 

 dredged by H.M.S. "Challenger" (2 vols. 4to. London, 1884) ; and 

 the multitudinous figures are massed in 21 pages of the text, 

 having been copied and printed by the Meisener-Riffarth process. 

 Thus the Porcellanous forms are closely grouped, as 189 species, 

 in plates i. ii. and iii. at pages 26, 35, and 49 ; the Arenacea in 

 plates iv. and v. with 98 species, at pages 60 and 67 ; Textularias in 

 pis. vi. and vii. with 108 species, at pages 76 and 85 ; and so on 

 with the Hyalina ; Bulimina, Polymorphina, Lagena, Nodosaria, 

 Cristellaria, Globigerina, etc., haviug separate pages, on which the 

 crowded types and varieties may be studied at once, at pages 90, 

 114, 128, 146, 157, and 164. Eight more pages, of 411 figures, are 

 devoted to the Rotalians and other interesting forms. 



This wealth of illustrations, crowded into 21 pages, if not good 

 as artistic plates, are yet very good and useful as galleries of 

 portraits, bringing whole collections of types and their varieties — 

 the heads of families and all their collateral relatives — under the 

 eye at once and in close proximity to one another. T. R. J. 



