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XII . — The Foraminifera of the Gault of Folkestone. — III. 
By Frederick Chapman, F.B.M.S. 
( Bead 1 Qth November , 1892.) 
Plates XI. and XII. 
Subfamily TEXTULARIINJE — continued * 
Tritaxia Reuss [I860]. 
Tritaxia tricar inata Reuss, plate XI. figs. 1 a , b. 
Textularia tricarinata Reuss, 1845, Verstein. bohm. Kreid., pt. 
i. p. 39, plate viii. fig. 60. Tritaxia tricarinata Reuss, 1860, 
Sitzungsb. k. Ak. Wiss. Wien, vol. xl. p. 228, plate xiii. figs. 1, 2. 
This form is easily distinguished from the succeeding one by the 
rounded salient edges, the comparative smoothness of its test, and the 
more elongate form. It appears to bear the same relation towards 
T. pyramidata as Verneuilina triquetra does to V. variabilis , 
T. tricarinata is found in its most flourishing condition, both as 
EXPLANATION OF PLATES. 
Plate XI. 
Fig. la, b . — Tritaxia tricarinata Reuss. x 45. 
„ 2a, b. „ pyramidata Reuss. x 45. 
„ 3a, b. — Spiroplecta annectens Parker and Jones sp. x 60. 
„ 4. „ complanata Reuss sp. x 45. 
„ 5. „ prselonga Reuss sp. X 45. 
„ 6. „ anceps Reuss sp. X 60. 
„ 7. — Gaudryina filiformis Berthelin. x 70. 
„ 8a, b. „ pupoides d’Orbigny. X 60. 
„ 9a, 6. „ rugosa d’Orbigny. x 60. 
„ 10a, b. „ dispansa sp. n. x 60. 
[„ 11a, b . — Valvulina conica Parker and Jones, x 45. 
„ 12. „ fusca Williamson sp. x 30. 
Plate XII. 
Fig. la, b. — Gaudryina oxycona Reuss. x 60. Fig. 16, showing the triserial ar- 
rangement at the fractured extremity. 
99 
2 . — Bulimina 
, Orbignyi Reuss. x 60. 
9* 
3. 
99 
obliqua d’Orbigny. x 60. 
4. 
99 
Presli Reuss. x 60. 
99 
5. 
99 
„ var. sabulosa var. n. x 50. 
99 
6. 
99 
Murchisoniana d’Orbigny. x 50. 
7a, b. 
99 
obtusa d’Orbigny. X 60. 
99 
8, 
99 
brevis d’Orbigny. x 50. 
99 
9. 
99 
pyrula d’Orbigny. x 60. 
10a, b. 
99 
affinis d’Orbigny. x 45. 
5) 
11. 
99 
polystropha Reuss. x 160. 
12a, b.- 
—Bolivma textularioides Reuss. x 70. 
99 
13 a, 
—Pleurostomella obtusa Berthelin. X 70. 
14a, 6. 
„ alternans Schwager. x 60. 
See ante, p. 319. 
