76 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY, 
same as last. The sample consists of uncompacted fine calcareous sand, with 
few large fragments in it. The facetted fragments, a few pieces of lamelli- 
branch shells, and. a branch of a calcareous alga (?) were noted. Some few 
ovules. Part of a spine of an echinus. Тһе test of a foraminifer of the genus 
Cristellaria (1). Almost nothing is determinable. 
650 feet. — Color gray, like 600. A very friable sand-rock, like the last. 
Limpid quartz is very small in amount, and seems to be of finer grain than the 
average. Spines of echini, lamellibranch shells, an alga (7), and pieces of 
odlite were noted. Almost nothing is determinable 
675 feet. — Gray, like 600, possibly a little darker, A very friable sand-rock. 
Quartz like the last, but with more of the larger rounded grains. Small pieces 
of oólite, lamellibranch shells, spines of echini, and tests of foraminifera 
noticed. Опе of the last looked like an Orbitolites and another like a Clavu- 
lina. As in the preceding five, there is a great dearth of referable fossil 
remains. 
700 feet. — Color yellowish gray-white, very different from 675 and above. 
Marked change in the rock. Sample is a very fine uncompacted sand, almost 
all of which passed through the No. 40 mesh sieve.  Amount of guartz 
sand has dropped off considerably. Тһе quartz grains are more varied in size 
than has been usual. Fragments of lamellibranch shells and spines of echini, 
small pieces of oólite, and many detached ovules are present. Almost nothing 
is determinable. The whole sample looks like a fine beach sand. 
725 feet. — Yellowish white (ecru) limestone, mostly a ‘shell rock.’ 
Amount of quartz reduced to a trace. Many relatively large fragments of 
lamellibranch shells are present, some of which are recognizable as Pectens or 
closely related shells. A very few minute gastropods. Spines of echini and 
pieces of their tests, many ovules and some pieces of odlite observed, bryozoa, 
and foraminifera (Amplistegina ? Orbitolites ? etc.) are numerous. A consid- 
erable proportion of the sample is of determinable fragments. A globular 
7 
foraminifer appears and is relatively abundant. 
750 feet. — Color yellowish white (ecru). Very small amount of quartz 
sand. Fragments and internal casts of lamellibranchs, — pectinoids, ete. 
Parts of internal casts of minute gastropods. Fragments of tests of echini. 
Orbitolites (2) and other foraminifera. Ovules but no oólite observed. Some 
bryozon. A few fragments of corallines (2). 
775 feet. — Color. very light yellowish brown. А hard, rather porous, 
highly fossiliferous limestone. Trace of the quartz sand very fine. Many 
shells and casts of pectinoids and other (small) lamellibranehs. Small gas- 
tropods. Spines and plates of echini.  Ovules present in small numbers. 
There are considerable fragments ( x 2" x $") present, but no coral was 
observed. Foraminifera are very scarce, if present at all none were observed. 
800 feet. — Very light yellowish brown, like the last, Amount of quartz 
sand small, but greater than in any of the last four samples. The rock seems 
to have been a rather hard, very porous limestone. Ovules rather numerous. 
Foraminifera (Orbitolites 2 Cristellaria 2 Amphistegina ? ete.) in numbers. A 
