REPORT ON THE FORAMINIFERA. 
449 
K. Lagena lebouriana, Brady, 1876, Monogr. Carb. and Perm. Foram., p. 121, pi. viii. fig. 6. 
L. Lagena vulgaris, var. gothica, Rymer Jones, 1872, Trans. Linn. Soc. Lond., vol. xxx. p. 51, pi. xix. 
fig. 9. 
M. Lagena howchiniana, Brady, 1876, Monogr. Carb. and Perm. Foram., p. 121, pi. x. figs. 1-5. 
X. Lagena tetragona, Parker & Jones, 1865, Phil. Trans., vol. civ. p. 420, pi. xviii. fig. 14, a.b. 
O. Oolina melo, d’Orbigny, 1839, Foram. Amer. Merid., p. 20, pi. v. fig. 9. 
P. Lagena tubiferro-squamosa, Parker & Jones, 1865, Phil. Trans., vol. civ. p. 420, pi. xviii. fig. 7, a.b. 
Q. Futosolenia marginata, var. lucida, Williamson, 1858, Bee. For. Gt. Br., p. 10, pi. i. figs. 22, 23. 
R. Fissurina acuta, Reuss, 1863, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi. p. 340, pi. vii. figs. 90, 91. 
(The specimen figured, PI. LIX. fig. 6, though probably belonging to this variety, is not typical). 
S. Tetragonulina prima, Seguenza, 1862, Foram. Monotal. Mess., pi. ii. figs. 54, 55. 
T. Fissurina dentata, Id. Ibid. p. 58, pi. i. fig. 55. 
U. Fissurina tricuspidata, Reuss, 1870, Sitzungsb. d. k. Ak. Wiss. Wien, vol. lxii. p. 470, No. 3 ; — Schlicht, 
1870, Foram. Pietzpuhl, pi. v. figs. 16-18. 
Y. Fissurina diptera, Seguenza, 1879, Atti R. Accad. dei Lincei, ser. 3, vol. vi. p. 332, pi. xvii. 
fig. 36. 
W. Entosdlenia marginata, var. ornata, Williamson, 1858, Rec. For. Gt. Br., p. 11, pi. i. fig. 24. 
X. Fissurina capillosa , Sch wager, 1866, Novara-Exped., geol. Theil, vol. ii. p. 210, pi. v. fig. 25. 
Y. Fissurina bicarinata, Terquem, 1882, Mem. Soc. geol. France, ser. 3, vol. ii., Mem. III. p. 31, pi. i. 
fig. 24, a.b. 
Z. Lagena pidcliella, Brady, 1870, Ann. and Mag. Nat. Hist., ser. 4, vol. vi. p. 294, pi. xii. fig. 1, a.b. 
AA. Lagena vulgaris, var. clypeato-marginata, Rymer Jones, 1872, Trans. Linn. Soc. Lond., vol. xxx. p. 58, pi. 
xix. fig. 37. 
The geographical distribution of the genus is subject to no restrictions either of 
latitude or depth of water. It is to all appearance equally at home in the Arctic Ocean, 
at the Equator, and at the Antarctic Ice-barrier. It is common in littoral sands between 
tide-marks and in estuarine shallows, and at every intermediate depth to the abysses of 
mid-ocean at 3000 fathoms or more. 
Its geological distribution is on a corresponding scale. Characteristic specimens of 
two species have been discovered by Mr. John Smith of Kilwinning, in the Upper Silurian 
shales of Staffordshire and Herefordshire, and at least three forms are known to have 
existed during the Carboniferous epoch. From the Trias only one, and that a somewhat 
doubtful variety, has been recorded, 1 but from the Liassic and Oolitic formations the 
number of forms is considerable, and the rocks of the Cretaceous period have furnished 
not less than thirteen well-marked species or varieties. In early Tertiary times there 
was again a great accession of species, and in the later formations the genus became one 
of the most abundant of all the Foraminiferal types. 
1 Lagena polygona (?) Reuss, Sitzungsb. d. h. Ah. Wiss. Wien, vol. lvii. p. 107, pi. i. fig. 11, from tlie Trias of 
St. Cassian. 
