Zoovuyra. | DEVONIAN RADIATA. 74 
the adult of this species; it has the lamellar sulci very little more distant than in the young (three in two 
lines), the number, however, being about fifty-one; the diaphragms are closer than in the A. coralloides, 
and the lamellated margin broader, being rather more than one-fourth of the diameter, and the surface 
also differs from the carboniferous species in being more wrinkled. 
Position and Locality —Not uncommon in the Devonian limestone of Newton Bushel. 
Genus. CYSTIPHYLLUM (Lonsd.) See page 32. 
CyYsSTIPHYLLUM DAMNONIENSE (Lonsd.) 
Ref.—Lonsd. Geol. Trans. Vol. V. t. 58. f. 114. Phill. Pal. Foss. t. 4. f. 11 6, d and «. 
Sp. Ch.—Corallum very elongate, conic, slowly tapering, reaching a diameter of one and half inch at 
about three and half inches from the apex, continuing nearly cylindrical for several inches at a diameter 
of one inch eight lines; marked with concentric strong wrinkles of growth; epitheca thin, smooth, with 
or without obsolete longitudinal strize ; lamelle thin, the primary ones reaching about one-third of the 
diameter towards the centre; secondary lamellze very fine, rather more than half the length of the primary ; 
about forty-four primary, and an equal number of secondary lamellie, all of which reach the outer wall 
in the young (or at a diameter of one inch), but separated from it by a narrow dense vesicular layer in 
the adult; about four lamellze in the space of two lines in the adult: horizontal section, central area 
nearly half the diameter, composed of very irregular vesicular plates of moderate size ; outer area containing 
the radiating lamelle, connected by very irregular cellular tissue of thin vesicular plates, which entirely 
obscure the lamellze at the circumference of large examples: vertical section composed of rounded vesicular 
plates, forming rows gradually arching under the middle; cells largest in the centre. 
Position and Locality—Common in the Devonian limestone of Newton Bushel. 
CYSTIPHYLLUM VESICULOSUM (Gold. Sp.) 
Syn. and Ref—Cyathophyllum id. Gold. Pet. Germ. t. 17. f. 5; Phill. Pal. Foss. t. 4. f. 12. 
Sp. Ch.—Corallum conic, varying considerably in the rate of increase in different specimens; cup 
deeply excavated, when finely preserved marked with narrow, close, minutely denticulated lamellee about 
four in two lines (eighty-eight all round), and in some states of preservation these are visible externally, 
while in others both the cup and exterior seem one mass of large vesicular rounded cells: horizontal and 
vertical sections presenting a nearly uniform large vesicular tissue, without trace of radiating lamelle ; 
the cells slightly depressed, rounded, averaging one line or slightly more in length, arranged in obscure 
rows, curving under the centre. Average diameter of adult cup, one inch eight lines; usual length 
of specimens, four or five inches. 
The much greater size of the vesicular plates, and absence of radiating lamelle in the transverse 
section, easily distinguish this species from the C. Damnoniense. 1 have compared our British species 
with authentic examples from Gerolstein of Goldfuss’s species to be certain of their identity; stbme of the 
latter occasionally shew vertical lamellar striz on the outside of the same character and number in a given 
space, as the Devonshire specimens. 
Position and Locality—Common in the Devonian limestone of Newton Bushel. 
Genus. ACERVULARIA (Schw.). See page 35. 
ACERVULARIA PENTAGONA (Gold. Sp.) 
Syn. and Ref.—Cyathophyllum pentagonum (Gold.) Pet. Germ. t. 19. f. 3. Astrea pentagona (Lonsd.) 
Geol. Trans. Vol. V. t. 58. f. 1. 
Sp. Ch.—Corallum forming rounded masses of hexagonal unequal-sided stars, averaging two to two 
and half lines in diameter (a few stars pentagonal, from the straight line indicating the original bipartite 
fission of an old hexagonal star); central area circular (tubular), thick-walled, about a line in diameter ; 
boundary walls distinct, not thicker than the lamellee, often angularly bent to meet their alternating ends ; 
