280 
Figure 62 
to fourth legs of right side. 
NEW YORK STATE MUSEUM 
Stylonurus elegans Laurie. 
(From Laurie) 
Second 
specimen of S. cestrotus 
which retains both in full 
length, distinctly shows that 
there was a considerable dif- 
ference in the two pairs, the 
fourth being shorter in total 
length by about one sixth, 
and each of its segments a 
little shorter than the cor- 
responding one of the fifth 
[pl. 40, fig. 6]. In S. ele- 
gans Laurie, where the last: 
two pairs are also shown, 
this difference is still greater 
[text fig. 62]! and the same is 
suggested by Laurie’s draw- . 
ing of S. macrophthal- 
mus (1892, pl. 2; fig, Io]. 
It would seem then that all 
specimens of Stylonurus, ex- 
cept the original S. pow- 
riei, exhibit a distinct 
difference in length between 
the last two pairs of legs. 
From the two figures of 
S. powriei, published 
successively by Woodward 
(eOx piers, tig. 17 18% 2, 
pl. 21, fig. 1], it also becomes 
obvious that that specimen 
must possess the same dif- 
' See also Laurie, 1899, pl. 2, 
fig. 12, 13 
