MIDDLE CHALK—BEDFORDSHIRE AND HERTFORDSHIRE. 467 
• 
Zone of 
Rhyn. 
Cuvieri. 
Terebratulina 
Zone. 
* v 
Ostrea norma niana, cTOrb. 
_ 
2 
_ 
,, vesicularis, Lam. 
- 
2 - 
— 
2 
— 
— 
Radiolites Mortoni, Mant. 
■- 
— 
— — 
— 
2 
- 
- 
Spondylus spinosus, Sow. 
■- 
— -V 
- 
2 
3 
- 
5 , latus, Sow. - 
- 
2 — 
— 
2 
3 
Brachiopoda. 
tthynchonella Cuvieri, d'Orb. 
- 
1 
2 3 
— 
— 
3 
4 
,, „ (small var.) - 
- 
- 
- — 
1 
— 
— 
4 
sp. - - - 
- 
1 
— — 
| — 
— 
— 
— 
Terebratula semiglobosa, Sow. 
- 
1 
2 3 
1 
2 
3 
. 4 
Terebratulina gracilis, var. lata, Eth. - 
- 
1 
2 - 
1 
—• 
— 
4 
„ striata, Wahl. 
- 
2 — 
— 
3 
4 
Fchinodermata. 
Cardiaster pygmseus, Forbes - 
- 
2 - 
- 
- 
- 
— 
Cidaris Merceyi, Cotteau 
- 
— 
— — 
— 
2 
— 
— 
,, (spines) ----- 
- 
- 
2 3 
— 
2 
— 
4 
Cyphosoma granulosum, Goldf. - 
- 
— 
— - 
— 
2 
— 
— 
Discoidea Dixoni, Forbes 
- 
— 
2 - 
— 
2 
3 
— 
„ minima, Ag. - 
- 
— 
2 3 
- 
— 
— 
— 
Galerites castanea, Brongn. - 
~ 
2 - 
— 
2 
— 
- 
„ snbrotundus, Mant. - 
- 
1 
2 ~ 
— 
2 
3 
- 
Ilemiaster minimus, Ag. - 
- 
- 
2 - 
1 
- 
- 
- 
Holaster planus, Mant. 
- 
- 
- - 
- 
2 
— 
— 
Salenia granulosa, Forbes - - * - 
- 
- - 
- 
2 
- 
- 
Ceplialites paradoxus, Smith 
- 
- 
- — 
1 
- 
- 
- 
Ventriculites sp. - 
I 
