300 
The American Geologist. 
May, 1801 
MISCELLANEOUS. 
7.3. 
74. 
Corallites may be free in part or united by their 
epithecal walls. 
Made up of a series of superposed lamina), impressed 
with the cell pits. The ruga' in some species, have 
alternating pores. 
iVKAREST RKMTIVKN. 
Cyathophylloides. 
(Compound forms.) 
Darwinia. 
Costa' are strongly developed and sloping down from 
rim are confluent. Much resembles Pachypbyllum Pachyphyllum. 
in external appearance. 
70. 
77. 
78. 
7!) 
80. 
81. 
82. 
83. 
84. 
The septa extend from the outer vesicular zone for 
a short distance towards the center. 
The fovea is indicated merely by the shortening of 
the principal septum. 
Form is long, slender and terminated by an abruptly 
expanded cup. 
Corallites are formed by a series of superposed, blis- 
i tered calicinal cups, confluent in neighboring stems. 
Septa are generally represented merely as low ridges 
or rows of spines extending over the vesicles. 
Corallites are parallel, wholly or partly in contact and 
united by transverse filaments, stems are bifur- 
cating. 
At the center the rows of vesicles are convex upwards 
forming an elevation in calyx. 
85. 
86. 
87. 
89. 
90. 
91, 
Lindstrom considers this synonymous with Cyathoph- 
yllum. 
Lindstrom considers this a Cystiphyllum. 
Lindstrom considers this a Cystiphyllum. 
Zittel states that a round or oval, concentrically 
wrinkled operculum exists. 
1. Lonsdaleia. 
2. Campophyllum. 
1. Zaphrentis. 
2. Cyathophyllum. 
(Simple.) 
Cystiphyllum. 
Cystiphyllum. 
1. Cyathophyllum. 
2. Cystiphorolites. 
Cystiphorolites. 
Plasmophylluin. 
I yathophyllum. 
1. Cystiphyllum. 
2. Cyathophyllum. 
Clisiophylloides. 
Rhizopora. 
An operculum of sub-triangular valves is said to be 
present. No trace of its attachment was observed 
in the specimens examined. 
Supplied with a thick, semi-elliptical operculum, 
which has a strong median ridge. 
Slight depressions in the angles of the calyx. < Oper- 
culum composed of four paired pieces meeting at 
the center. 
Operculum is simple, semi-elliptical with median 
ridge. Corallites have strong root-like appendages. 
1. Cystostylus. 
2. Fletcheria. 
1. Goniophyllum. 
2. Cystiphyllum. 
Rhizophyllum. 
1. Calceola. 
2. Rhizophyllum. 
Calceola. 
92. 
93. 
Thin, curved lamellae or ridges extend from inneri 
edges of primaries to outer edge of central depres- Aspidophyllum. 
sion. 
Inner edges of the primaries are united to the central 
cells. 
Fasciculophyllum. 
94. 
95. 
9G. 
97. 
The central area is formed by the radial columellarian 
septa, united by the concave tabulae. 
Cymateophyllum. 
The secondary septa may he minute or may extend 
inwards for a considerable distance, uniting with Centrocellulosum. 
the primaries. i 
The broad tabulae of the intermediate area are bent 
downwards near the wall and attached to it or to Fasciculophyllum. 
zone of vesicles. 
Central radial lamellae extend from inner edges of 
primaries, coalesce and forma more or less irregu- Koninckophyllum. 
jar rod. 
