oO 
The transition from intestine to rectum is readily geen, not only on account of the 
constriction but on account of the change in color. 
The sexual anlage is about three-fourths as long as the body is wide, and about 
one-third as wide as long, and seems to considt of no more than two to four celis, 
though the exact number is doubtful; certainly the number of cells is small. It 
should be noted that the sexual anlage is considerably in front of the middle point 
between the base of the neck and the anus, the ratio being, distance fro the ossoph- 
agus, to distance from the anus as three to four. 
fhe striking features of thie larval nema are, (1) the nature of the two-mend- 
iblee head, (2) the suehion shaped papillae near the anus,(3) the cylindroid neck, 
(4) the well-developed musculature, (5) the deirids, and (6) the fact that ib is 
found parasitic in cyclops. Examined after fixation in osmic vapor followed by Flen 
ming over night. - | 
Habitet: The specimen from which this decription is derived was found by Dr. @. 
B. Wilson, Auguet 19, 1926 «t=@eeteHote, in a fresh water pond at Chatham, Mass. in 
@ specimen of cyclops, (Pachy cyclops siqnabus)« 

