424 Wisconsin Academy of Sciences^ Arts^ and Letters. 
Proales quadrangularis (Glasscott). 
Notops quadrangularis Glasscott, Proc. Eoyal Dublin Soc., new ser., vol. 8, 
1893, p. 43, pi. 3, fig. 3.— Hauer, Mitt. Bad. Landesver. Naturk., Freiburg 
i. Br., new ser., vol. 1, 1921, p. 184, text fig. 
Furcularia quadrangularis Murray, Trans. Eoyal Soc. Edinburgh, vol. 45, 
1906, p. 180. 
Furcularia glol)ulifera Hauer, Mitt. Bad. Landesver. Naturk., Freiburg i. 
Br., new ser., vol. 1, 1921, p. 185 
The last-named species is evidently valid, and, judging from the 
figures and description given by Hauer, it should be included in 
this genus. 
PEOALES GIGANTEA (Glasscott). 
Plate XVII, figures 6-10. 
. Notommata gigantea Glascott, Proc. Royal Dublin Soc., new ser., vol. 8, 
1893, p. 80, pi. 7, fig. 1. 
? Proales ovicola Giard, Feuilles jeunes Nat., vol. 38, 1908, p. 184. 
Proales gigantea Stevens, Journ. Quekett Micr. Club, ser. 2, vol. 11, 1912, 
p. 481, pi. 24, figs. 1-5. 
The body of the free-swimming animal is nearly cylindric, short 
and stout; its greatest width is about one fourth of the entire 
length. The integument is very soft and flexible and the outline 
constantly changing. 
The head is short and broad; the neck is represented by two or 
three indistinct folds, which do not encircle the body completely. 
The abdomen is elongate ovoid and slightly constricted at the base 
of the foot; the tail is distinct, but not very prominent. The foot 
has two short joints, both very large in diameter, and terminates 
in a hemispherical bulb with the two very small toes set far apart; 
on the posterior dorsal margin of the foot there is a prominent 
spur, projecting at a nearly right angle with the longitudinal axis 
of the body; the toes are abruptly reduced to short, needle-like 
points. 
The dorsal antenna is a small, setigerous papilla in the normal 
position; the lateral antennae have not been observed. 
The corona is oblique and weakly ciliated with the exception of 
two lateral, auricle-like areas provided with strong cilia adapted to 
propelling the animal through the water. The mouth is at the 
posterior margin of the corona. 
The mastax is closely related to the primitive malleate type. The 
incus is nearly straight; the fulcrum is long, slender and slightly 
