292 Messrs. Parker and Jones on 



interest to geologists at home ; for they contain a faithful 

 portraiture of the very minute Foraminifera of the Chalk of 

 Gravesend in Kent, and of Meudon, near Paris. They were 

 therefore taken in hand by us not long since, as the means of 

 correcting and augmenting the catalogue of fossil Foraminifera 

 from the Chalk ; and the results appeared in the ' Geological 

 Magazine/ vol. viii. pp. 506 & 563 et seq. We have little to 

 add to our remarks there offered, and here reproduced, except 

 that, for the sake of convenience, as usual in the case of 

 Rhizopods, we are willing to enter under catalogue-names a 

 few more of the subvarieties, and to make some slight revision 

 in the lists representing the two plates. 



In No. 89 of the ^ Geological Magazine,' p. 511, we merely 

 indicated the genera and species of Foraminifera found by 

 Dr. Ehrenberg in the White Chalk of Meudon, near Paris, 

 and figured in his ' Mikrogeologie, 1854. In our list twenty 

 species were enumerated (with the nomenclature now in use) 

 as the result of our study of the fifty-six forms figured and 

 separately named in his plate of Meudon Foraminifera*. To 

 render our work more useful to rhizopodists and bibliogra- 

 phists, we proceeded, in No. 90 of the same Magazine, to 

 take the figures in succession, noting that, as we had before 

 stated, the grouping on the plate has a more natural associa- 

 tion of allied forms than that shown by the numerical order. 



PI. xxvii. fig. 1, Miliola oviwiy ■=Lagena glohosa. Fig. 2, 

 Nodosaria turgescens, is one and a half of the last chambers of 

 a compact variety of the simple N. ovicida. Figs. 3, Texti- 

 laria striata (1838), 4, T. stdcafa, and 5, T. dilatata (" T. 

 brevis?, 1538 "), belong to Ehrenberg's T. striata, a subspecies 

 or notable variety, worthy of a binomial term. Fig. 6, Text. 

 gJohulosa (1838), is the small or young form of T. gihhosa, 

 D'Orb., and for convenience is often referred to by the name 

 given by Ehrenberg. Fig. 7 a-d, T. linearis, = Bolivina 

 jjimctata. Fig. 8, Text, aculeata (" T. aspera, 1838, in part"), 

 is a tliick-walled form of Textilaria gihhosa, jDroduced and 

 aculeate on the edges at the outer angle or base of each cham- 

 ber, and would be conveniently distinguished by the name 

 here given ; but D'Orbigny had previously called it sidmngu- 

 lata. Figs. 9, a, b, Grammostomum pacliyderma (" Text, acicu- 

 lata, 1838, = several thin species of Gravimostomum ''''), and 

 10, Gr. angulatum, are specimens of a coarse-shelled Bolivina 

 punctata. Fig. 11, Gr. polgstigma, = Text, sagiftida. Fig. 12, 

 G?'. titehaicum, seems to be an oblong Textilaria agglutinans, 

 A\itli a growth like that of T. sagittula; but Gr. thehaictim, 



* The description of this plate is reprinted, with revision, from the 

 * Geological Magazine,' vol. viii. pp. 503, 564. 



