262 J. Bacon on Oil in Crustaceans found in Cochituate Water. 
sein present is exceedingly ee = only at different pier 
t in ditferent individuals collected at the same time. 
isis no globules are visible. in pevshe they are so bub 
ant, that the oil forms at least one quarter part of the bulk of the 
imal. These large quantities occur only in the Cyclops, which 
is by far the — abundant form present; the other crustaceans 
contain much le 
is sarihatiaen in the body of the animal is remarkable, being 
diffused Sk ened in globules of various apm (usually spherical 
and occasionally ovoid or pear-shaped,) and in masses formed by 
the padecaine of globules; and it appears to have no definite 
connection with the internal sous of the animal. Some 
small globules are seen even in the last joints of the tail. No 
or envelop is visible avout tiem, as they occur in the animal, e 
when liberated by tearing the body into fragments. Yet glob- 
ules lying in contact in the body do not unite by peat pres- 
sure, but regain their form when the pressure is remo 
A strong pressure causes them to run together. These facts 
when seen throug h it. 
Finding that the comparatively large size of the crustaceans, 
allowed of their almost perfect separation from the other bodies 
suspended in the water,.by means of a suitable filter, a qnantity was 
collected from a Cochituate service pipe, and thoroughly washed 
with. distilled water. They were then introduced, “mostly in a 
living state, ie ag water, in an open vessel. In about half 
an hour, the water began to aequire an odor, and after some 
es devel The watércwas now somewhat it ilky, a and: on 
microscopic examination, an abundance of colorless oil globules, 
were seen diffused through it, with some gelatinous matter, de- 
rived from the bodies of the dea d crustaceans, with the fragments 
of which, together with éxuvie, the bottom of the vessel was 
covered, A large proportion were still living and active. In 
successive examinations. 
In the lo Cale these giclee are found equally in both sexes, 
and cann ot therefore be derived from the ova; in many of the 
i sta Ee lad eS 
