416 
CLAUSA. 
Dimensions. 
Diameter of branch . . . 
Diameter of zooecia ... 
Diameter of apertui’e 
B.M., D. 2651. 
... -8 mm. 
... -16 „ 
... -08 „ 
Disteibution. 
England : 
Upper Chalk : Salisbury. 
Fokeign : 
Senoniau — Maastriclitian : Maastricht ; Royan, Charente-Inferieure. 
Campanian : Riigen. 
Coniacian : St. Christophe, Indre-et- Loire ; Les Roches^ 
Loir-et-Cher. 
Coniacian? or Turonian : Villavard, Lavardin, Lisle, etc., 
Loir-et-Cher. 
Turonian — Angoumian : Villardin, Les Roches, and Montoire, Loir-et- 
Cher. 
PlGUEES. 
PI. XIII. Fig. 16. A branch, X 10 dia. Upper Chalk: 
Salishmy. Vine Coll. D. 2651. 
Fig. 58. Longitudinal section of a branch, x 7 dia. Turonian — 
Craie marneuse : Yillardin Station, Loir-et- Cher. D. 4644. 
Fig. 58 . — Clausa irregularis (Orb.). Longitudinal section. 
LIST OF SPECBIEXS. 
British. 
D. 2651. Two fragments (on slide). Upper Chalk. Salisbury. Tine Coll., 
No. 59. Figd. PI. XIII. Fig. 16. 
Foreign. 
D. 4705. A branched fragment (on slide) . Turonian: Craie marneuse. Yillardiu 
Station, Loir-et-Cher. Purchased 1898. 
