102 
Aug. F. Foerste 
For those chonophylloid corals which have a flat base, upon i 
which the calycular side arises in a manner resembling a low vol- « 
canic crater, the designation Craterophyllu 7 n is proposed. This i 
term includes Craterophyllum vulcanius from the Brownsport bed, 
Craterophyllmn canadense from the Anticosti Group, and an unde- ^ 
scribed species from the Devonian limestone at Louisville, Ken- ^ 
tucky. ^ 
Diphyphyllum proliferum. 
{Flute I, Figs. i8 A, B, C, D.) 
This species is closely related to Diphyphyllum rugosum as |j 
figured by Rominger from Louisville, Kentucky, on plate 45, vol. I| 
iii. Geological Survey of Michigan. Rominger mentions that the i 
gemmation from the calyces is very prolific; from 4 to 6 gemmae \ 
grow at once from an end cup. In the Tennessee specimens 4 ^ 
gemmae are common, 6 are very rare. Rominger states that the : 
lateral processes for mutual attachment of the stems are acanthi- i 
form and quite numerous; in the Tennessee specimens, however, 1 
no lateral processes were noted, and therefore they can hardly be i 
numerous even if present. Moreover, the Tennessee specimens 1 
can hardly be said to be annulated by subregularly repeating con- r 
strictions, the constrictions hardly being sufficiently pronounced 
to constitute annulation. In fact, Rominger’s figure shows com- ■ 
paratively little strong annulation. 
The figure by W. J. Davis, on plate 109 Kentucky Fossil 
Corals, 1885, appears more typical as regards annulation and the 
presence of numerous acanthiform processes. The form figured ‘ 
as Eridophyllum sentum, on plate 108, appears to have septa extend- j 
ing as superficial carinae of the tabulae quite to the center of the 
calyx. In the Tennessee specimens there are between 40 and 50 | * 
septae, crenulated, of two orders, alternating, the primaries usually 
extending only a slight distance beyond the margin of the tabulae, , ; 
but in one calyx extending as superficial carinae of the tabula 1 
almost to the center. The tabulae occupy the central area and the 1 
septa are confined chiefly to the peripheral cycle; there is no inter- 
mediate vertical wall. Septa connected at regular intervals by 1 
dissepiments. Diameter of stems between 7 and ii mm. single 
specimens occasionally attaining a width of 14 mm. Calyx 3 to 4 
mm. deep. Exterior marked by 'low, often indistinct, longitudinal 
