188 FORAMINIFERA OF THE CRAG. 



is one of the most abundant of the Lagenae. Its geological range is likewise very 

 extensive. It has been found in the Upper Silurian of Woolhope (Brady) ; in the 

 Lower Lias of Yorkshire (Blake) ; in the Gault of Folkestone (Chapman) ; in the 

 Upper Chalk of Swanscombe and Taplow (Chapman), and of Keady Hill (Winght) ; 

 in the Eocene of London Clay; in the Oligocene of Elsass ; in the Miocene of 

 Malaga, and of Muddy Creek, Victoria ; in the Pliocene of Garrucha (South 

 Spain), Piedmont, Kar-Nicobar, and St. Erth ; and in Pleistocene deposits 

 generally. In the Coralline Crag it is rare, but specimens have been found at 

 nearly every zone examined. It has also been found in the Red Crag. It is to be 

 noted that, while L. sulcata is rare in the Crag, the closely allied form L. acuticosta> 

 is very common. 



8. Lagena acuticosta, Reuss, 1862. Plate I, figs. 42, 43 (" L. sulcata," Part I, 



p. 36). 



Lagena acuticosta, Reuss, 1862. Sitz. k. Ak. Wiss. Wien, vol. sliv, p. 305, pi. i, 



fig. 4. 



— — Idem, 18153. Ibid., vol. xlvi, p. 331, pi. v, fig. (33. 



— SULCATA (part), P. and J., 1865. Phil. Trans., vol. civ, p. 351, pi. xiii, 



figs. 30 a, 6, 31«, b. 



— —( — ),/., P., and B., 1866. Monogr. For. Crag, p. 36, pi. i, 



figs. 42, 43 (not 41). 



— ACUTICOSTA, Reuss, 1870. Sitz. k. Akad. Wien., vol. Ixii, p. -167, No. 10. 



— No. 55, Schlicht, 1870. Pietzpuhl, p. 10, pl. iii, figs. 17 and 23. 



— ACUTICOSTA, Butschli, 1880. In Bronn's Klassen, &c., p. 197, pl. vii, fig. 9. 



— — Brady, 1884. Eeport ' Challenger,' pp. 445 and 464, pl. Ivii, 



figs. 31 and 32 ; pl. Iviii, figs. 20 (?), 21. 



— — Brady, Parker, and Jones, 1888. Trans. Zool. Soc, vol. xii, 



part 7, p. 222, pl. xliv, figs. 26 a, h, 31. 



— — logger, 1893. Abhaudl. k. Bayer. Ak. "Wiss., vol. xviii, 



part 2, pp. 321 and 329, pl. x, figs. 47, 48, 

 80—84. 



— — Chapman, 1893. Journ. E. Micr. Soc. for 1893, p. 583, 



vol. viii, figs. 12 a, b. 



— — Idem, 1894. Quart. Journ. Geol. Soc, vol. 1, p. 706. 



Figs. 42 and 43 were included in L. sulcata at page 36 of Part I (1866), and 

 as a " strong form " in the explanation of Pl. I. This is an extreme example of 

 the ridge-growth, and has been separated off by Reuss as having relatively few 

 and large costfs, which he describes as being sometimes (from Pietzpuhl) high and 

 thin. Two good specimens were figured in the ' Phil. Trans.,' 1865, pl. xiii, 

 figs. 30 and 31 ; and were referred to at page 351 as the best characterised 

 among the group " sulcata " by their large size, boldness of growth, strength of the 



