ZooPuyra. | DEVONIAN RADIATA. 69 
ALVEOLITES VERMICULARIS (M/°Coy). Fig. a, 6, ¢. 
Ref—M Coy, Ann, Nat. Hist. 2nd Series, Vol. VI. p.377. 
Sp. Ch.—Corallum forming polymorphous masses of obscurely defined concentric layers of short irregularly 
‘ and obtusely polygonal, vermicular, flexuous tubuli, traversed by regular horizontal diaphragms, slightly more 
or less than the diameter of the tubes apart; cavity of the tubes in vertical and 
horizontal sections separated by at least their diameter of sclerenchyme ; about six 
tubes in the space of one line. 
I believe this species has been confounded with the very distinct Favosites 
(Alveolites) spongites of the Hifel, in which, however, the tubes are half a line in 
diameter (only two openings in the space of one line), they are also straight, 
instead of vermicular or minutely flexuous, and have the sclerenchyme much thin- 
ner in proportion to the size of the tubes, presenting all the characters (as I find 
from examination of authentic specimens) represented with great fidelity in Goldfuss’s 
figures t. 28. f. 1 a to 1 ¢ of the Petrefacta Germaniew. The branched varieties which 
become hollowed by age, are extremely liable to be confounded with large speci- 
mens of the Caunopora ramosa, but the structure is coarser, the tubules though 
Alveolites vermicularis. D « ; 
1G Bart of branch, natural size, flexuous, are far straighter and more ¢uJe-like, and finally, the transverse diaphragms 
internal cavity of old examples. CAD always be made out by a little rubbing down of the surface, while they certainly 
6 magnified section shewing the aes : : 5 
diaphragms in the tubes and thick do not exist in the smaller and far more irregular sponge-like tissue of the Cawno- 
solid interspaces. e¢ outer surface 5 a ° 5 0 
magnified. pora. 1 have noticed in some slate specimens that the oblique cell-openings on the 
surface are rhomboidal, with the lower angle very prominent and spinose. 
Position and Locality—In the Devonian limestone of Teignmouth ; Devonian shale of Newquay, and 
slates of Bedruthen Steps, St Eval. 
Genus. CYATHOPILYLLUM (Gold.) 
= Floscularia (Bich.) 1829. 
Gen. Char.—Conical, simple, branched, or densely aggregate; cup concave: horizontal section with 
radiating straight lamelle from the walls towards the centre, which they either reach or not; lamelle 
connected by numerous small transverse plates: vertical section; centre crossed by horizontal, thick plates, 
between which and the walls is a cellular structure composed of small arched plates inclining upwards and 
outwards. The young cones sprout in the compound species from the margin of the old cell. 
This genus, when closely aggregate, has been frequently confounded with Astrea, but the polypes 
have no community, and there is in every case a distinct solid thin wall between the contiguous stars, 
which is never the case in Astrwa. 
Those Cyathophylla which have no vesicular outer area, and approach Amplexus, are called Calophyllum 
by Dana, and fall better perhaps under that genus. The species in which the rows of vesicular structure 
of the outer area run downwards and outwards, are separated by Hall under the name Heliophyllum 
(American Journal of Science, 1846). 
CYATHOPHYLLUM CasPITOsuM (Giold.) 
Ref—Gold. Pet. Germ. t. 19. f. 2. 
Sp. Ch.—Corallum forming slender, cylindrical branches, upwards of five or six inches long, with a 
nearly uniform diameter of four to five lines; epitheca thin, with small, irregular, transverse undulations ; 
inner area rather more than half the diameter of the tube, occupied by inclined, slightly irregular, nearly 
horizontal, diaphragms, about two reaching across the base; outer area composed (in the vertical section) 
of about two rows of rounded vesicular plates: horizontal section, shewing forty-five to fifty radiating 
