A chart of the Rugose corals. — Sherzer, 
285 
INCREASE. 
FORM. 
WALLS. 
EPITHECA. [ COST^E. 
CALYX. 
Ova, calicinal 
gemmation. 
Sub -cylindrical 
or curved con- 
ical. 
One. 
Plainly de 
veloped 
Present. 
Little deepened. 
Ova. 
Conical. 
One. 
Plainly de 
veloped 
Present. 
Bather shallow. 
Knob-like eleva- 
tion at center. 
Ova. 
Turbinate. 
One. 
Present. 
Present. 
Large and deep. 
Ova. 
Conical. 
One. 
Complete. 
Strong. 
Moderately deep. 
Strong projection 
from the center. 
Ova. 
Conical. 
One. 
Complete. 
Present. 
Large and deep. 
Ova. 
Turbinate. 
One. 
Complete. 
Present: 
Moderately deep. 
Ova, lateral gem- 
mation. 
Sub-conical. 
One, 
thick. 
Well de- 
veloped. 
Present. 
Rather deep. 
Ova. 
Turbinate. 
One. 
Ova. 
Turbinate, short 
pedicled. 
One. 
Deep. 
Ova. 
Turbinate. 
One. 
Present. 
More or less 
distinct. 
Broad, margin 
thick, deep cen- 
tral pit. 
Ova, 
Sbort conical. 
One. 
Bather 
well de- 
veloped. 
Distinct and 
broad. 
Basin-like. More 
or less deepened. 
Ova, gemmation. 
One. 
Ova, calicinal 
gemmation. 
Cylindrical, 
slender. 
One. 
Present. 
Present. 
Ova. 
Conical. 
One. 
Present. 
Ova. 
Conical, or con- 
ico-cylindrical. 
One. 
Well de- 
veloped. 
More or less 
distinct. 
Pinate. 
Moderately deep. 
Ova. 
Turbinate, con- 
ical or conico- 
cylindrical. 
One. 
Thin. 
Plainly 
marked. 
Deep, generally 
with thin mar- 
gins. 
Ova. 
Sub-cylindrical. 
One. 
Ova, calicinal 
gemmation. 
Prismatic or cy- 
lindrical. 
One, or 
two. 
Preseut,also 
as a common 
covering. 
Present. 
Abrupt central pit 
with explanate 
margins. 
Ova. 
Turbinate or 
con i co-cylin- 
drical. 
One. 
Thin. 
Present. 
Rather deep with 
generally a strong 
projection. 
Ova. 
T u r b i n a t e or 
conico-cylin- 
drical. 
One. 
Complete. 
Distinct. 
Rather shallow. 
Helmet -s li aped 
eminence at center. 
Ova. 
Turbinate, coni- 
ical. 
toe. 
Present. 
Complete. 
Distinct. 
Rather deep and 
spacious. 
Ova. 
Conico-cylindri- 
cal, curved. 
I wo. 
More or less 
distinct. 
Deep: thin around 
periphery. Central 
up-shaped projection. 
Ova. 
Turbinate. 
["wo. 
Complete. 
Present. 
Moderately deep- 
ened, circular or 
slightly deform'd 
Ova, calicinal 
gemmation. 
!onico-cj lindri- 
caJ. 
>ne. 
Tliin, com- 
plete. 
Present. 
More or less deep* 
ened. 
t (?) Medusaephyllum, Boemer; (?) Asterocyclus, Vanuxern. 
AstrsBophyllum, Nicholson and Hinde (1874), is now considered by .Mr. G.J 
Hinde as a silicined and weathered Strombodes. 
