90 BRITISH PALAOZOIC FOSSILS. [Zoopuyta. 
wall; no axis; vertical section shewing irregular transverse diaphragms or broad vesicular plates in the middle, 
extending downwards and outwards, and diminishing in size at the circumference; a strong lateral siphonal 
depression as in Caninia. 
These corals differ from Caninia in wanting the outer perithecal small vesicular area, or lining to the walls; 
from Amplexus, in the more irregular vesicular nature of the transverse plates, particularly at the circumference, 
distinct siphon, and greater extension of the lamelle ; from Calophyllum (which I only know by name), by the 
vesicular edges of the transverse plates between the lamelle at the walls, and the distinct lateral siphonal 
depression. 
CYATHOPSIS CORNU-BOVIS (Mich. Sp.) 
Syn. and Ref—Caninia cornu-bovis. Michelin, Icon. Zooph. t. 47. f. 8. 
Sp. Ch.—Sub-cylindrical, slightly curved at the tip, abruptly tapering at the end, seven lines wide at 
eight lines from the base, generally about two inches long, diameter at that length only nine lines; vertical 
lamellze thirty-three, large, very thick, equal, only three or four in one-fourth of an inch at the margin, one 
extremely small secondary lamella at the margin between each pair of primary, making about six of the obtuse 
vertical costal strize in a quarter of an inch; no cellular structure between them and the walls; marginal 
siphon large, occupying the space of two lamelle; middle transversely septate, the circumference of the 
diaphragms deflected to the walls between the lamellie ; surface transversely rugose. 
Known by its slender form and remarkably thick distant lamellz. 
Position and Locality—Not uncommon in the carboniferous limestone, Derbyshire. 
CYATHOPSIS CORNU-COPLE (Mich. Sp.) 
Syn. and Ref.—Caninia cornu-copie Michelin, Icon. Zooph. t. 59. f. 5. 
Sp. Ch.—Corallum slender, conical, averaging one inch five lines long, and ten lines in diameter, at that 
distance from the apex; terminal cell very oblique; external surface without distinct lamellar strize, smooth or 
only marked with fine, transverse plicee of growth; transverse diaphragms strong, with a very wide and deep 
conical, siphonal depression, near the convex side of the curve; radiating lamelle thin, thirty-four or thirty- 
five in number, uniting branch-wise in few large bundles as they reach the centre, one being obsolete at the 
siphon. 
The smooth surface (without vertical lamellar strie), generally smaller size and more slender form, 
distinguish this from the young of Cyathopsis fwngites; the transverse diaphragms, and conical siphonal 
depression, are very remarkably developed in this species, in which the absence of the vesicular plates of 
the true Caninia is very remarkable, care being taken in the horizontal sections not to confound the deflected 
edges of the lamelle with them. In sections towards the apex, we note that the diaphragms which are 
horizontal in the middle in old corals, converge upwards at a very acute angle in the young (as occurs 
also in others of the genus), and the irregular anastomosing, or branching of the lamellze, is also most 
strongly marked at that part. 
Position and Locality—Not uncommon in the carboniferous limestone of Kendal, Westmoreland ; car- 
boniferous shale of Glasgow; carboniferous limestone of the Isle of Man. 
Cyatuopsis? ERUCA (AZ°Coy) not figured. 
Ref—M°Coy, Ann. Nat. Hist. 2nd Series, Vol. VII. 
Sp. Ch.—Corallum very small, subcylindrical, after a diameter of three lines, which it reaches at six 
lines from the apex, slightly curved; length of large example one inch two lines, diameter three and half 
lines ; surface marked with coarse, longitudinal, obtuse lamellar strice, three in the space of one line ; radiating 
lamelle strong, slightly irregular, connected by several curved thick transverse vesicular plates in the hori- 
