BARBADOS-ANTIGUA EXPEDITION 217 
which is also represented by two or three species, one of which 
is strikingly large, with heavy thick valves, and coarsely ribbed. 
Gastropods are rare and are chiefly represented in the collec- 
tion by a few specimens of a very pretty Scala. A number of 
species of small brachiopods were found. Corals occur in 
abundance and in great variety; some of them as they appear 
in the gray crystalline limestone have an unexpectedly Paleo- 
zoie aspect at first sight, so complete is their calcification. By 
far the most sought-for fossils were the sea-urchins. The tests 
of the urchins are very well preserved and seldom, indeed, does 
a paleontologist find so many and such perfect forms. They 
were found in ‘‘spots’’ although an occasional specimen could 
be expected at nearly every exposure. At one small spot along 
a cliff on Gaynor’s stream nearly forty perfect specimens were 
removed from the weathered stone in an hour’s time. In all be- 
tween eighty and one hundred specimens of these interesting 
forms were collected during one or two visits to this locality. 
The specimens vary in size from less than one inch in diameter 
to large individuals six or seven inches across and they undoubt- 
edly represent several genera and species. 
In many places between the soil and the limestone there is a 
bed of powdery marl from one to several feet thick. This marl 
often contains many bleached and brittle shells of land-snails. 
At Hodge Point, for example, several species occur, among them 
a species of Plewrodonte which is larger and more robust than 
any of the hving forms of the genus seen on the island. Along 
with the fossil Plewrodonte are representatives of the genera 
Bulimulus, Cistula (?), Succinea, and Helicina. According to 
Mr. W. R. Forrest of St. Johns, Plewrodonte is not found living 
on this part of the island; but we found it plentifully in the 
woods on the slopes of Monk Hill ten miles away, but with much 
smaller shells. Helicina is extinct on Antigua, but a very close- 
ly related species lives abundantly on the island of Barbuda. 
These ‘‘semi-fossil’’ land snails were found at several places in 
the marl of the limestone area,—a small lot from near Blizzards 
Mill and another from near the Rectory in St. Philip may be 
mentioned. 
During the prosecution of the work much valuable aid was 
given by several people. Mr. A. E. Collens of the Government 
