352 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
AMPHISTEGINA LESSONII d’Orb. 
PoLYTREMA MINIACEUM a Sp. intergrown with 
Lithothamnion. 
MILiotina. 
TEXTULARIA. 
? GAUDRYINA. 
320 ft. A coral rock with Lithothamnion. 
Foraminifera: ?GyYpsiIna INH@RENS Schultze, sp. A long wander- 
ing form which may possibly be a Polytrema. 
350 ft. No organisms are recognizable with certainty. 
370 ft. Fragments of echinoderms are abundant; also Lithothamnion ; 
Gasteropoda are present. The rock is fragmentary and the organisms 
are for the most part in a fresh condition. 
Foraminifera: GypsiINa INHGRENS Schultze, sp. 
CARPENTERIA ; Dumerous fragments. 
¢ DiscoRBINA. 
316, No. B, ht. 400 ft. The organisms are very indistinct in conse- 
quence of dolomitization. As usual Lithothamnion has proved most 
resistant to alteration. Echinoderm fragments, corals, and Lithotham- 
nion are recognizable besides the following 
Foraminifera : AMPHISTEGINA LESSONII, d’Orb. 
POLYTREMA. 
? HererosTeGina. Small fragments probably belong 
here. 
?CarpentTeRIA. A fragment. 
NGILLINGILLAH. The island is apparently composed of coral rock 
500 ft. thick, but Mr. Andrews finds that the island consists of bedded 
limestone, covered by coral rock and reef-débris at most 200 ft. thick. 
There are signs of three, or possibly four, periods of upheaval. 
318, No. B, ht. 25 ft. The section consists of dolomitized coral, the 
crevices of which are filled with a black mud composed of organic frag- 
ments amongst which Lithothamnion, echinoderms, and a rotaline foram- 
inifer are recognizable. Tunicate spicules are also probably present. 
308, No. 43, ht. 215 ft. The rock has undergone dolomitization and 
the only organisms recognizable with certainty are corals. 
301, No. 77, ht. 475 ft. The slide shows Lithothamnion and Poly- 
trema growing in alternating layers. Other organisms have been obliter- 
ated by dolomitization. 
Foraminifera: PotytReEMA PLANUM Carter. 
enh aie 
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