508 Prof. T. R. Jones and W. K. Parker — On Foraminifera, 



of 'N. ovicula, D'Orb., with rather short chambers. 4. Vaginulina 

 nodulosa is a variety of Eoemer's V. laevigata, with a peculiar 

 (concretionary?) shell-structure. 5. F. cret^ (brachjartJira) seems 

 to he (if really flat, as is probable) F. longa, Cornuel sp, 6. 

 Textilaria striata, Ehr. 1838. More fully illustrated in pi. xxxii,, I., 

 figs. 4a, 46, 7, and II., 6, 18, from the Missouri and Mississippi Chalk. 

 7. A broad individual of T. striata. 8. Text, ampliata {T. as per a, 

 1838) is a young T. gibbosa, D'Orb., with roughish shell. 9 and 10. 

 Text, globulosa (1838). 11. T. leptotheca, and 12. T. globulosa ampliata, 

 are individuals of T. gibbosa. 13. Loxostomum curvatum is an arcuate 

 T. agglutinans, the later chambers of which have the aperture higher 

 and higher up ; thus passing, in its quasi- generic character, from 

 Textilaria proper into Grammostomum. Indeed, it may be the young 

 of Ehrenberg's Lox. Anglicum (fig. 19 of the same plate), which is a 

 rather narrow and neat Gram, pennatula, Batsch sp. 14. Grammos- 

 tomum scabrum seems to be only a small coarse-shelled Text, agglu- 

 tinans, D'Orb. 15, 16. Gr. polytrema is Virgulina ScJireibersii, 

 D'Orb. 17. Gr. aculeatum is a variety of Verneuilina triquetra, 

 Miinster sp., with aculeate edges : it is seen from one of its three 

 flat sides. 18. Textilaria aculeata is a small rough T. agglutinans, 

 with flattish chambers. 19. See above. 20. Proroporus cretce is 

 PolymorpJiina Thouini, D'Orb. See the " Monograph on Polymor- 

 phina^ by Brady, Parker, and Jones, Linn. Soc. Trans., 1870, vol. 

 xxvii., p. 232. 21. Bigenerina cretce, and 22. B. acantJwpora, are 

 also P. Thouini (loc. cit.). 23. B. apiculata is P. compressa, "Mon. 

 Polym." p. 227. 24. Loxostomum vorax is also Polym. compressa, 

 and should be added to the sjmonyms in the " Monograph Polym.," 

 p. 227. 27. Lox. tumens, and 26. Lox. aculeatum, however, are slightly 

 differing individuals of Heterostomella aculeata, Ehr. sp. This may 

 be described as a prickly loose-grown Textilaria, which, having 

 ceased to grow in the typical manner (with a double row of alter- 

 nating chambers) , has continued with a single row (as a Bigenerina), 

 and these have not only got terminal, instead of lateral, apertures, 

 but have become lipped, as in Sagrina rugosa, D'Orb. (1840). 

 D'Orbigny, however, had applied the name " Sagrina " to a Uvi- 

 gerine Foraminifer (S. pulchella) in 1839. In 1866 Eeuss pub- 

 lished the name Heterostomella as distinctive of the " Textilarian " 

 Sagraina (Sitzungsb. Akad. Wien, vol. lii.). Ehrenberg's "Loxos- 

 tomum," though older (1854), is so misapplied by him (to Folymor- 

 pliina, Grammostomum, and a transitional form between the latter 

 and Textilaria proper), that naturalists may well hesitate to use it. 

 H. aculeata is figured also in pi. xxvii., figs. 21, 22. 27. Polymor- 

 pJiina turio is a narrow and typical specimen of Virgulina ScJireibersii, 

 D'Orb., which is subgenerically related to Bulimina. 28 and 29. 

 Pleurites ? calciparus, 30. SpJiceroidina cretacea, and 32. Grammobotrys 

 Anglica, are broad and flattish individuals of Virgulina HempricJiii, 

 Ehr. sp This species is well figured (under many different names) 

 in the "Mikrogeologie." It is very variable in form, but constant in 



1 Some of Ehrenberg's figures quoted in this Monograph as Folymorphina, we find, 

 on fuller consideration, to be VirgulintB, etc. 



