HOVEY: ARTESIAN WELL AT KEY WEST. TO 
the last, and next to nothing is determinable. Small amount of the limpid 
quartz sand with the usual features, Fragments of a bryozoan and a very few 
lamellibranehs and eehini noted. "Phe sample includes lumps of firm white 
oblite. 
500 feet. — Color decided gray, with white fossils and pearl-gray limestone. 
Sand-rock, rather friable but with hard lumps. Contains some fossils, which 
are white, and some white aggregations, as well as fragments of compact gray 
limestone. Occasional small lumps of white oólite are present. Quartz sand 
present in small amount as before. Pieces of compact gray limestone show, in 
the thin section, the stromatoporoid structure noted at 300 feet and doubtfully 
referred to a nullipore, This is made up of branching, anchylosed tubes 
solidified by calcite. Fragments of lamellibranchs, one of them a Corbula, 
another an Arca (7); spines and other parts of echini. A nearly entire spine 
had been perforated lengthwise by a boring lamellibranch now in it. Bits of 
coral are not rare, There are also a few fragments of bryozoa. Gastropod 
remains are very scarce. Saw part of internal cast of one minute one. 
525 feet. — Color decided gray, with white lumps and yellow-white fossils, 
A very friable sand-rock containing masses of hard white porous rock and white 
fossils and calcite. Much like preceding in color, amount of quartz sand, ete. 
It is composed of loosely compacted, very fine calcareous sand, with few solid 
fragments and almost nothing recognizable. А piece of porous limestone 
shows moulds of lamellibranch shells, spines of echini, ete. There is also a 
piece showing the “© stromatoporoid " structure, like those in the material from 
300 feet and 500 feet. Some oólite; secondary calcite, of course. Some indi- 
sations of coral. 
550 feet. — Color decided gray, like 475. A very friable sand-rock, very 
uniform in color and texture. Almost no bits of white. The small amount 
of quartz sand present is relatively coarse in grain. Remarkably destitute of 
determinable fragments, recognized none in fact. 
575 feet. — Color decided gray, like 475. A friable sand-rock like the last 
except that it contains some recognizable fragments. Small amount of the 
quartz sand present. Some ovules and an occasional small piece of oblite 
present. Sample mostly a very fine sand, more than two thirds of it going 
through a No. 40 mesh sieve. Fragments of lamellibranch shells, one minute 
gastropod, three or four bits of bryozoa, ana one piece of coral recognized. A 
few foraminifera of the genus Amphistegina were noted. 
600 feet. — Color decided gray, like 475, but lighter shade. A friable sand- 
rock containing much white material which is mostly crystalline limestone or 
granular calcite. Quartz sand in small amount as before, very fine grained, 
angular, no large particles. A few ovules are present and some fragments of 
lamellibranchs together with the facetted fragments. More than three fourths 
of the sample went through the sieve, much of the fine stuff being mere dust, 
Almost nothing determinable. 
625 feet. — Color gray, like 600. А very friable sand-rock, but with less 
white material in it and therefore darker colored as a whole. Limpid quartz 
