510 ZOOPHYTA. LAMELLIFERJE. Cyclolites. 
Fungia turbinata, Flem. Wern. Mem. ii, 250 — Zetland. 
This species occurred in the same boat in which I picked up the Caryophyl- 
lea cyathus. Though greatly defaced, it still exhibits proofs of its recent ori- 
gin. It is inversely conical, pointed, subarcuated, with a concave disc and a 
prominent centre ; the plates appear to have been equal. It is about five- 
tenths of an inch in height, and nearly the same in breadth across the star. 
EXTINCT SPECIES. 
1. T. Inversely conical, with twenty-four longitudinal striae, the 
interstices striated by pairs of pores in each, disposed in numerous parallel 
transverse rows,— Lamouroux Zoop. 51. t. Ixxiv. f. 18, 21. Geol. of Eng. 3. 
London Clay. 
2. T. -Inversely conical, aperture circular, divided into numerous 
perpendicular lamellae, radiating from the axis to the circumference ; axis 
simple ; margin crenulated ; external surface longitudinally striated ; striae 
from 25 to 30, distinct, prominent, base convex — Mant. Geol. Suss. 85. t. xix. 
p. 22, 28 — Blue Chalk Marl. 
3. T. Fungites . — Inversely conical, lengthened ; more or less bent ; longi- 
tudinally striated, with irregular transverse wrinkles ; star concave, with a 
large central axis. Fungites, tTire, Ruth. 327. t. xx. f. 6 — In Carboniferous 
Limestone., common ; frequently termed Barfs Horns. The specimens in my 
possession differ greatly in their breadth compared with their length ; in one 
the plates converge to the centre, without a solid axis ; and in another, there 
are external drooping cylindrical processes from the sides near the small end. 
Gen. cyclolites. — H emispherical; star convex, with 
smooth slender lamellae ; the centre depressed ; below flat, 
with concentric lines. 
1. C. Elliptical ; lamellae obsolete; the central cavity length- 
ened. — Lamarck., Hist. ii. 234.— Geol. Eng. 245 — Inferior Oolite. 
Gen. explan aria, — S tem irregular, foliaceous, waved, 
lobed, with the extremities covered with sessile, stellife- 
rous discs. 
1. 'EA.flexuosa Stem compressed, proliferous, reticulated at the base, with 
transverse and longitudinal striae ; the superior stellated surface covered with 
stars, closely set, and formed of raised undulating radii.— Madreporite, Park. 
Org. Rem, ii. 49. t. vii. f. 1 1. — E. mesenterica, Geol. Eng. 245 ? — Inferior 
Oolite. 
Gen. ASTREA. — Massive, the stelliferous discs rounded, and 
imbedded in the nearly even surface. 
1. A. aracJmoides. — Stelliferous discs close, smooth ; the plates proceeding 
from the centre are waved across the margin, and are lost in the surrounding 
matter. — Madrepora arach. Park. Org. Rem. ii. t. vi. f. 4 — Oolite. 
2. A. undulata. — Stars continuous, the rays unequal, bifurcated and bend- 
ing. — Madrepora und. Park. Org. Rem. ii. Bristol. 
