626 
GILBERT E. JOHNSON. 
naiTOw tubes connecting the ovaries with the uteri and bent 
in the form of an S or a U. The eggs are oblong-oval. 
Those of the typical putrefaction form are 56 p in length and 
37 jit in diameter, while those of the form reared on peptone, 
though so much fewer in number, are 62 p in length and 
47 in diametei'. 
The bursa (PI. 37, fig. 9), the copulatory organ of the male, 
is broadest in the middle. In all the males that I have seen 
the tail is prolonged a short distance beyond the end of 
Text-pig. 2. 
9 
8 
7 
6 
5 
Tail of a male Rhabditis jiellio B. as seen in ventral view, showing 
the disposition of the bursal papillae. 
the bursa, whose edge is emarginated at the place of emer- 
gence. There are nine papillm, disposed in groups of three 
each (Text-fig-. 2). 'J'he posterior three are close togethei-. 
Counting from the posterior end the second papilla is usually 
nearer to the third than to the first. The median three are 
also close together, and separated from the posterior group by 
an interval. In the median group the fifth papilla is usually 
nearer to the sixth than to the fourth. The interval between 
the anterior and median groups is equal to that between the 
median and posterior groups. In the anterior group there is 
a somewhat wide interval between the seventh and eighth, and 
a very wide interval between the eighth and ninth papillae. 
