34 FORAMINIFERA OF THE CRAG. 
The distribution of the common, smooth, flask-shaped Lagene is world-wide ; they are 
often found at considerable depths, but shallow water appears to be their favorite 
habitat. In the fossil state this smooth variety is very abundant in the Post-pliocene 
clays of Lincolnshire and Cambridgeshire, and in the Grignon beds (Eocene) ; it occurs 
also in the Vienna Tertiaries, and in the Crag of Antwerp and the Septarium-clay of 
Pietzpuhl (Reuss); in the Tertiary beds of Taranto (Costa), and in the Miocene clay of 
Messina (Seguenza). 
The Crag specimens in Mr. Wood’s Sutton collection are few in number, and small. 
3. Lacuna semistriaTa, Williamson. Plate IV, fig. 6. 
OoLINA STRIATICOLLIS, D’Orb., 1839. For. Amér. Mérid., p. 21, pl. 5, fig. 14. 
LAGENA STRIATA, var. 6, SEMISTRIATA, Williamson, 1848. Ann. Mag. Nat. Hist., 2nd 
ser., vol. i, p. 14, pl. 1, figs. 9, 10. 
OvuLiNA LacryMa, O. TENUIS, Bornemann, 1855. Zeitsch. Deutsch. Geol. Ges., vol. 
vii, p. 307, pl. 12, figs. 2, 3, 3*. 
Oona PuNcTaTA, O. stRIaTULA, Egger, 1857. Foram. Mioc. Nied.-Bay., p. 6, pl. 1, 
figs. 1—8. 
LaGENA VULGARIS, var. SEMISTRIATA, Williamson, 1858. Ree. For. Br., p. 6, pl. 1, fig. 9. 
— — var. PERLUCIDA, Id., 1858. Ib.,'p. 5, pl. 1; figssi7eree 
— _ var. SEMISTRIATA, Reuss, 1562. Sitz. Akad., vol. xlvi, p. 322, 
pl. 2, figs. 18—21. 
— TENUIS (parte), Id. Ib., p. 325, pl. 3, figs. 34—39. 
— STRIATA (parte), Id. Tb}, p..327, pl. 3, figa4as 
PHIALINA LONGISSIMA, Seguenza, 1862. For. Mon. Mioc. Messin., p. 45, pl. 1, fig. 18. 
— SEMICOSTATA, Id. Ib., fig. 19. 
LAGENA SULCATA, var. SEMISTRIATA, Parker and Jones, 1862. In Append. Carpenter’s 
Introd., p. 309. 
— SEMISTRIATA, Brady, 1864. Trans. Lin. Soc., vol. xxiv, p. 472. 
_ SULCATA, var. SEMISTRIATA, P. and J., 1865. Phil. Trans., vol. clv, p. 350, 
pl. 13, fig. 23. 
Characters.—Shell flask-shaped, usually having the neck longer in proportion to the 
body than in the other varieties, having strize and riblets extending from the base of the 
shell upwards for a short distance on the sides. Colour white; very transparent. 
Length jth to 4th inch. 
This is not an uncommon subvarietal form where Lagene prevail; but there is too 
little that is distinctive in its differentiation from elongated specimens of the typical 
L. sulcata to lay down any very definite scheme of its distribution. As Professor Wil- 
liamson remarks, the costa may terminate either in the lower, middle, or upper third of 
the shell; and though in the first or even the second case it would be easily recognised, 
it is obvious that in many individuals with longer ribs other characters, such as the length 
