References
- See Mr. Bauerman's section of the Mokattam Cliff Quart. Journ. Geol. Soc. London xxv 40 40
- 1856 . This kind of growth characterizes Ehrenberg's proposed genus Monetulites, Abhandl. , : 145 – 145 . note.
- Quart. Journ. Geol. Soc. , iv 328 – 328 .
- Geological Magazine , viii 563 – 563 . 564.
- 1871 . Geological Magazine , viii ( 11 ) November
- 1859 . Geology in the Garden , pl. 2. fig. 9, pl. 9. fig. 9 c and in figs. 39 & 39 c, of pl. 7
- Such a Virgulina from the English Chalk is figured in Eley's Geology in the Garden 1859 pl. 2. fig. 12, and pl. 8. fig. 12 c