180 IOWA STUDIES IN NATURAL HISTORY 
sometimes cut into strips and use as razor strops. A number of 
sections of these may-poles are lashed together to form a raft 
with sides and ends made in the same way. The box-like boat is 
about ten feet long and four broad, is exceedingly light and 
can be paddled at a very respectable rate. We saw it in use 
only in the protected waters of the bays, but were told that the 
natives sometimes venture out even on the windward coast 
in this seemingly frail craft. 
Crustacea.t—Here as at Barbados the largest crustacean was 
the ‘‘erayfish,’’ or Palinurus, some of which were brought in by 
fishermen. Aside from this, there were no large macrurans, the 
species secured being small, shrimp-like forms, usually obtained 
by overturning or breaking up rocks, particularly coral rocks. 
Among these may be noted Stenopus semilevis, var. martens, 
with an orbicular carapace about as wide as long. It was bright 
red, the two chele being nearly of the same size. A spiny ridge 
originates near the base of the rostrum and runs backward along 
the median line of the carapace. The eyes are nearly sessile 
and quite unusual in color, being bright red with jet black cen- 
ters like the pupils of vertebrates. The antennules are, as 
usual, bifid and very attenuate, while the antenne are long, 
closely annulated and armed with short setzw. There was also a 
shrimp-like form with a pinkish back. The swimmerets were 
ornamented with very fine tufts of exceedingly delicate hairs. 
A shrimp, Metapeneus goodei, collected by the use of the elec- 
tric ight, was colorless, as were indeed nearly all of these noe- 
turnal creatures that are attracted by artificial light, and had 
relatively enormous jet-black eyes. The squame of the antenna 
was a marvellous structure, very delicate, translucent, and with 
a comb-like fringe of perfectly parallel and extremely fine hairs. 
The surface of the scale was beset with rigid, bristle-like hairs, 
hooked at their ends, and with small ring-like insertions. These 
were doubtless sensory structures. 
Several forms related to the ‘‘pistol crabs’’ were secured. 
One, Crangon armillatus, was nearly two inches long, the cara- 
pace being ornamented with conspicuous red bands, while the 
1Dr. Mary J. Rathbun has kindly identified most of the crustacea mentioned 
below. Any mistakes are to be ascribed to the author. 
