124 mOCEEDTNGS OF THE GEOLOGICAL SOCIETY. [Jail. 24, 



Sttppleiiext. 



In tlie foregoing paper we have compared side by side several 

 described sets of BotaUnce from the Cretaceous and Tertiary rocks, 

 and from the present seas. We know how imperfect the materials 

 for this critical collocation really are, and that the sketch view we 

 get of them in the foregoing Tables is but a glimpse into a wide and 

 unexhausted region. Numerous as the forms are that we have cata- 

 logued in their zoological order, for comparison by the naturalist, and 

 fertile as they are in suggestions as to range and relative persistence, 

 we do not forget the wholesome caution to llhizopodists clearly and 

 forcibly given by Prof. W. C. Williamson years ago, when treating 

 of the then new and striking researches of Ehrenberg and D'Or- 

 bigny : — "We must not cloud the evidence afforded by the higher 

 animals with that derivable from beings so much lower in the scale 

 of organization, and which, as a whole, are so far removed from the 

 influence of external agencies. The study is at once so novel and 

 so fascinating that all who pursue it, impressed by its singular 

 interest, are in danger of being allured by it beyond the bounds of 

 caution, — a tendency which is ever promoted by the announcement 

 of comprehensive hypotheses and splendid novelties." — ' Microscop. 

 Objects found in the Mud of the Levant,' p. 126. Memoirs Man- 

 chester Lit. ^ Phil. Soc. vol. viii. 1847. 



To make our subject as clear as known facts can help us to make 

 it, we here subjoin further lists of local groups of jRotalince, both 

 Eecent and Tertiary, prepared, on the same system of nomenclature, 

 for rigid comparison with those in the body of this paper. Prom a 

 study of these additional catalogues it will be found, as with the 

 others, that, for the most part, numerous slight varietal differences, 

 local and mainly recognizable in the fades of the group — indeed, 

 only to be brought out by good drawings, and scarcely describable, 

 — are important elements in the successional diversity that really 

 obtains among the Foramiuifera. These slight, but important, shades 

 of difference give rise to great multiplicity of names. This is a 

 trouble which we have endeavoured to deal with judiciously in all 

 our lists, basing our nomenclature on the principles laid down in our 

 memoirs in the 'Ann. Nat. Hist.,' in the ' Phil, Trans.' vol. civ., and 

 in Carpenter's ' Introd. Poram.' 1862. 



§ 1. — Recent Foeaminifeea. 



I. In further illustration of the Poraminiferal fauna of the Pacific 

 Ocean (see list, p. 115), we here offer a corrected list of the 

 Foraminifera found by Mr. G. D. Macdonald among the Fiji 

 Islands. See Ann. Nat. Hist. ser. 2, vol. xx, pp. 193 &c., 1857. 



PI. 5. f. 1 & 2. Doubtful. It. mon - ,i 



f. 3-5. Polycystina. ) ^^"°^^ ^^^^ lathoms. 



f. 6. Uvigerina pygmfea, Z*' Orh., dimorphous variety, "j -p A-n 

 f. 7-10. Lagena globosa et marginata {Montagu), En- l f^tboms 

 tosolcnitiD, j 



