110 
Bulletin Wisconsin Natural History Society. [Vol. 10, Nos. 3-4. 
produce a small ripple. The orientation of the body, as Holmes 
(’io) and McGinnis (TT) have pointed out is such that the ventral 
side is toward the source of light (hence usually uppermost), and 
Eubrorichipus dadayi, like E. ornatus and E. serratus, will change 
its position so as to preserve such a relation if it is placed in a 
glass dish and a light moved about it in various positions. Caiman 
Fig. 1. Eubranchipus claclyi. ‘One male is swimming near the sur¬ 
face of the water; another is being borne away by a dytiscid larva, 
A female lies among the leaves on the bottom.* 
(Tj, p. 163) suggests that the fairy shrimps are better protected 
from their enemies by swimming upside down, the delicate append¬ 
ages thus being less readily injured. 
When tested in a rectutangular glass dish in the laboratory, 
individuals of this species proved to be positively phototropic,— 
*The figures in this paper were drawn by Miss Barbara Bradley. 
