CORALS FROM THE GAULT. 61 
CHAPTER VI. 
CORALS FROM THE GAULT. 
Tue Fossil Corals contained in the Gault are more numerous than those imbedded in 
the upper greensand and the lower chalk. Most of them belong to the family of 
Turbinolide, and the principal localities where they have been met with in England are 
Folkstone and Cambridge. 
Family TURBINOLID Ai (p. xi). 
Tribe CYATHININA (p. xii). 
1. Genus CYarHtna (p. xi). 
Cyaruina Bowrrsankil. Tab. XI, fig. 1, la, 14. 
CyaTHiIna BowrrsBanxtl, Milne Edwards and J. Haime, Monogr. Turbin., in Ann. des Xe. 
Nat., 3° série, vol. ix, p. 292, 1848. 
Corallum simple, elongated, turbinate, very narrow, and slightly bent near the basis, 
which does not appear to have expanded much. /Va// quite naked. Coste almost flat, 
distinct from the basis, or nearly so, covered with small granulations, nearly equal, and 
showing a slight tendency to form binary groups. Ca/ice circular. Colwmella not much 
developed, and composed of twisted blades. Septa forming four complete cycla; very 
thin, but slightly granulated, and rather unequal. Those of the last cyclum very little 
developed, and the tertiary ones rather thickened towards the inner edge. Pali corre- 
sponding to the penultimate cyclum of septa, and rather broad. Height of the coral, 
eight or nine lines; diameter of the calice, three lines and a half. 
This fossil was found in the Gault at Folkstone, by our friend Mr. Bowerbank. All 
the specimens that we have seen were very incomplete, but some showed all the principal! 
characters represented in the figures which we have given. 
C. Bowerbankii is easily distinguished from C. Smithii and C. pseudoturbinolia, by not 
having a fifth cyclum of septa. It differs also from C. arcuata by the delicacy of its septa, 
and from C. Guadulpensis by the circular form of its calice, and its round columella. 
