70 BRITISH PALA®OZOIC FOSSILS. [Zoopuyra. 
lamellze, strongest in the narrow outer area, where half of them cease, the alternate ones sending delicate 
prolongations at a variable distance towards the open centre; branches at intervals of seldom less than 
two inches, either perfectly dichotomous, or lateral; abraded surface, shewing six interlamellar spaces in 
two lines. 
I have carefully compared this species with authentic specimens from the Eifel, and find them per- 
fectly identical. Some specimens are so perfectly dichotomous that they might be placed (as M. d’Orbigny 
has done) in the genus Diphyphyllum (Lonsd.), if that group could be retained, while other specimens in 
the same mass shew the young projecting as a lateral bud, from the straight undisturbed side of the 
parent tube, as in the Cyathophylla generally. 
Position and Locality —Common in the Devonian limestone and red shales of Newton Bushel. 
CYATHOPHYLLUM CERATITES (Gold.) 
Ref—Pet. Germ. t. 17. f. 2. f and h. 
Sp. Ch.—Corallum simple, conical, slightly curved; averaging two inches long, and one inch three lines 
in diameter at that length; rugged, with strong, irregular, concentric wrinkles ; epitheca thin, marked with 
obscure, obtuse, longitudinal strize, four to five in two lines; cup moderately deep, edge obtuse-angled ; 
centre flattened, smooth, surrounded by about seventy-six nearly equal, subalternate, finely denticulated, 
radiating lamelle, extending to the edge of the cup (four or five in two lines): vertical section shews the 
inner area to equal about half the diameter of the cone, composed of strong, slightly concave transverse 
diaphragms, about half a line apart. 
The so-called Cyathophyllum turbinatum of Goldfuss grows to a larger size, has much thicker, and 
fewer lamellze at a given diameter, and presents, I find, the internal structure of the genus Cystiphyllum. 
Position and Locality—Rare in the Devonian limestone of Newton Bushel. 
Genus. AMPLEXUS (Sov). 
Gen. Char.—Corallum simple, cylindrical when old, elongate-conic when young, flexuose; transversely 
septate, the plates reaching across the central area and deflected at their edges, where they are crenulated 
by very narrow, obsolete, radiating lamella, which mark the surface with vertical striz. 
The shortness of the radiating lamelle, and want of the outer zone of small connecting vesicular 
plates, separate this genus from Cyathophyllum. Calophyllum of Dana, and the synonymous Polycwlia of 
King, only differ in the greater extension of the lamellz, and can only be retained as provisional subgenera. 
AMPLEXUS TORTUOSUS (Phill.) 
Ref—Phil. Pal. Foss. t. 3. f. 8. 
Sp. Ch.—Corallum irregularly flexuous, subnodulose, or marked with irregular large obtuse, transverse 
wrinkles, most numerous in old specimens; young specimens three inches long and six lines in diameter, 
have about twenty-seven equal, vertical, marginal lamellze, three spaces between which occupy two lines; 
transverse diaphragms flat, or irregularly undulated, with a narrow deflected margin, on which rest twenty- 
four to twenty-eight vertical lamellee, which only extend towards the centre slightly more than their distance 
apart; transverse septa slightly irregular in distance, but averaging three interseptal spaces in two lines, 
so that the intersections of the vertical lamelli, and edges of the diaphragms on the abraded surface, 
form nearly square reticulations. 
In the young narrow examples of this species, the narrow marginal area, of vertical lamellz and 
deflected edges of the diaphragms, often splits off like a thick sheath from the inner horizontal septate 
portion, as shewn in Prof. Phillips’s figure, which however does not indicate the largely wrinkled surface, 
which, with the small number of lamell, easily distinguish it from the Carboniferous A. coralloides of the 
same size. A specimen, nine lines in diameter, has only twenty-seven lamell:e, and retains its lamellar 
sheath permanently. One enormous specimen, one inch nine lines in diameter, seems undoubtedly to be 
