A chart of the Rugose corals. — Sherzer. 
297 
INCREASE. 
FORM. 
WALLS. 
EPITHECA. 
COST;£. 
CALYX. 
O v a, calicinal 
gemmation. 
Prismatic or cy- 
lindrical. 
One. 
Complete. 
Wanting. 
Generally rather 
deep. 
Ova, submarginal 
gemmation. 
Laminated, with 
vertical tubes. 
None. 
Com in o n 
co\ er i ng 
on base. 
Polygonal when 
defined. Shallow 
with central pit. 
Ova, lateral gem- 
mation. 
Prismatic. 
One, 
strong. 
Present. 
Well de- 
veloped. 
Circular, promi- 
nent with rim ; 
rather shallow. 
Ova, calicinal 
gemmation. 
Cylicindrical or 
prismatic. 
One. 
Stout. 
Present. 
Shallow. 
Ova. 
Trochoid, horn- 
shaped. 
One. 
Prob a b 1 y 
present 
and large. 
Shallow. 
Ova. 
T r u m p e t - 
s li a p e d. 
One. 
Present. 
Apparently a 
thin, common 
epith eca. 
Faint. 
Epi t h eca 
is costu- 
lated. 
More o r 
less dis- 
tinct. 
Deep. 
Ova. calicinal 
gemmation. 
T u r h i n a t e to 
confluent. 
Nunc. 
Broad, shallow, or 
abrupt with cen- 
tral pit and rim. 
Ova, gemmation. 
Various. Coni- 
cal or conico- 
cylindrical. 
One. 
Complete 
but thin. 
Shallow and ba- 
sin-like or deep- 
ened. 
Ova, lateral gem- 
mation. 
Cylindrical. 
One. 
Present. 
Deep and funnel- 
shaped. 
Elevated cen- 
trally. 
Ova. 
Turbinate. 
One. 
Sub-cylindrical. 
• 
Ova, calicinal 
gemmation. 
Cylindrical. 
One, 
thick. 
Complete. 
Circular or slight- 
ly deformed. 
Edges thin. 
Ova, gemmation. 
Cylindrical. 
One. 
Thick, 
wrinkled. 
Circular. 
Ova. 
Quadrangular- 
prismatic. 
One, 
strong. 
One. 
Present. 
Distinct. 
Square; quite 
deep. 
Ova. 
Half-conical ; 
slipper-shaped. 
Co m i> le te, 
heavy. 
Faint, 
More o r 
less dis- 
tinct. 
Deep, pointed. 
Ova. 
Quadrangu 1 ar- 
pyramidal. 
One. 
One. 
thick. 
Heavy. 
Square. -MHiicwhat 
deepened. 
Ova. 
Half-conical. 
Cum plel e, 
strung. 
Indistinct. 
Deep, semi-circu- 
lar, pointed. 
Ova. 
Conico-cylindri 
ca 1 . curved, 
tall. 
One. 
Thin. 
Present. 
Circular, shallow 
and sometimes 
everted. 
Ova. 
Conico-cylindri 
cal, curved, 
small. 
One. 
Variable. 
Present. 
Deep, thin around 
margin. 
Ova. 
( lonico cylindri- 
cal or cornute. 
One. 
Thin. 
Present. 
Circular, moder- 
ately deep, some 
times everted. 
Ova. 
( !onico-cj lindri 
cal. curs ed, One. 
small 
Variable. 
Present. 
Variable in depth. 
Ova, 
Cylindrical, ta- 
pering to a 
point. 
One. 
Stout. 
Prominenl 
Shallow, with sep- 
ta everted. 
Conico-cylindri 
( )va. cal, rather tall, ( toe. 
curved. 
Usual b thin. 
Present. 
Usually shallow, 
more or less 
c\ erted. 
