LAGENA LAEVIGATA. 197 



The geological range of L. squamosa has not hitherto been found to extend beyond 

 the Tertiary deposits. It has been met with in the Eocene (Calcaire grossier) of 

 the Paris Basin, in the Miocene of Messina, and in the Pliocene of Belgium and 

 St. Erth. The specimen recorded as L. squamosa in the First Part of the Monograph 

 is L. reticulata, of Pleistocene age, from Bridlington. 



15. Lagena laevigata (Reuss), 1849. Plate VII, fig. 14. 



Fissurina LiEviGATA, Reuss, 1849. Denks. k. Akad. Wiss. Wien, vol. i, p. 366, 



pi. xlvi, figs. 1 a, b. 



— globosa, Bornemann, 1855. Zeitscb. Deutsch. Geol. Ges., vol. vii, 



p. 317, pi. xii, fig. 4. 



— simplex (?), Seguenza, 1862. For. Monot. Mess., p. 56, pi. i, fig. 44. 



— deltoidea, Idem, 1862. Ibid., p. 57, pi. i, fig. 45. 



— latistoma, Idem, 1862. Ibid., figs. 46, 47. 



— Bianco, Idem, 1862. Ibid., figs. 48—50. 



— acuta, Idem, 1862. Ibid., fig. 51. 



Lagena vulgaris, var. fissurina, O. Jones, 1872. Tr. Linn. Soc, vol. xxx, p. 51, 



pi. xix, figs. 6 — 8. 



— laevigata, Terrigi, 1880. Atti Accad. Pont. Nuovi Lincei, vol. xxxiii, 



p. 177, pi. i, fig. 6. 



— — Robertson, 1883. Trans. Geol. Soc. Glasgow, vol. vii, p. 24. 



— — Brady. Eep. ' Chall.,' pp. 446 and 473, pi. cxiv, figs. 8 a, b. 



— — Balkwill and Millett, 1884. Journal Microscopy, vol. iii, 



pp. 80, 81, pi. ii, fig. 6 ; pi. iii, 

 fig. 6. 

 — B., P., and J., 1888. Trans. Zool. Soc, vol. xii, part 7, p. 222. 



- — lucida, Fornasini, 1888. B. S. Geol. Ital., vol. viii, p. 47, pi. iii, figs. 5, 5 a. 



Characters. — Pyriform, compressed, the two faces rather convex, the transverse 

 section suboval, aperture entosolenian and narrow, with a short external neck. 



Occurrence. — Lagena laevigata is one of the most common and widely distributed 

 of recent Lagense. It was found by the ' Challenger ' at depths ranging from 

 2 to 3125 fathoms. It is likewise very common as a fossil, chiefly from Tertiary 

 deposits. It has been recorded from the Chalk of Riigen (Marsson) ; from the 

 Calcaire Grossier of the Paris Basin ; from the Oligocene of Elsass and Pietzpuhl ; 

 from the Miocene of Messina and Vienna ; from the Pliocene of Messina and 

 St. Erth ; and from the Pleistocene of Scotland. We have found it also in the 

 Casterlian and Scaldisian of Antwerp. In the Coralline Crag we have noticed its 

 occurrence only at Tattingstone and Broom Hill, both in zone d. 



