84 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
1,900 feet. — Color light yellowish brown, with many white particles, like 
the preceding, but the amount of residue on sifüng is eveu less than with that. 
A mere trace of the quartz sand is present, It is angular and limpid as usual. 
The sand may have been compacted to some extent, and there were some 
masses or layers of dense material in it, as is shown. by some angular frag- 
ments. Some few ovules. Organic remains consist mostly of foraminifera. 
There are besides a very few bits of madrepores, some spines of echini, and a 
few bryozoa. Remains of lamellibranchs are few and of gastropods still fewer. 
Some rings look like parts of calcareous alge, while others are portions of 
burrows and worm (1) tubes. 
1,925 feet. — Color yellowish brown, white spots. Trace of the quartz sand, 
but it seems to be rather more than in the last. The sample is a very fine 
sand, very little (about 5% ?) failed to pass the sieve. Some ovules present, 
This sand also appears to have been compacted to some extent, or to have had 
compact lumps, and there are some angular fragments of dense limestone in the 
material. Determinable organic remains are few. There are mostly forami- 
nifera of the usual genera. With these are some bits of madrepores (7), spines 
of echini, and bryozoa. Lamellibranch remains are rare, and those of gastro- 
pods were not observed. Some nullipores. 
1,950 feet. — Color light yellowish brown. Quartz sand present in a very, 
very few particles of the finest grain (angular). Not more than two per cent 
of the sample failed to pass through the sieve. There were some lumps to 
indicate that the sand had been compacted to some extent. Some ovules. 
There were also a few angular bits of dense limestone containing organic re- 
mains. Very, very little of the sample is determinable. There are a few large 
. Some 
foraminifera and some small ones. Тһе large forms are Textulare 
spines of echini were noted, and some pieces that were probably bryozoa. 
There were a very few remains of lamellibranchs, but none of gastropods were 
recognized. 
1,975 feet. — Color light yellowish brown, with many white spots. Quartz 
sand, a mere trace. Тһе sample is a very fine calcareous sand, like the last, 
with perhaps more compacted sand-rock in it. As before, there are a few 
angular bits or chips of dense limestone. In regard to organic remains it is 
like the last. 
2,000 feet. — The color has changed to a light brownish gray. Quartz sand, 
a slight trace, an occasional particle of which is rounded and is too large to 
go through the sieve. Less than half the sample went through: the sieve. 
The rock seems to have been a rather solid, very fossiliferous limestone. 
Foraminifera are very abundant, and of more than the usual genera, low coni- 
cal and high conical Testularias predominating. Bits of madrepore corals 
present in small numbers, Spines, plates, and larger fragments of sea-urchin 
tests are not uncommon, Several fragments of branching bryozoa were ob- 
served, and a few pieces of lamellibranch shells and casts, as well as a very few 
casts of minute gastropods. 
