PLATYCHELIPUS. 103 
is clearly separated from it by the 2-jointed branches 
of the first foot. Only one species has yet been 
observed. 
1. PLATYCHELIPUS LITTORALIS, nov. sp. Pl. LXXIX, 
figs. 20—23; and Pl. 
LXXX, figs. 15—19. 
Animal somewhat like Laophonte. Anterior antennze 
6-jointed (Pl. LXXX, fig. 15); first two joints large 
and thick, third equally long but only about half as 
broad, fourth and fifth about one third as long as the 
third, sixth equal to the third but more slender. The 
last four joints bear numerous short spine-like setze on 
the outer margin, besides several which are longer and 
more hair-like. The peduncle of the first pair of feet 
is stout and 2-jointed, the basal joint being beset with 
numerous setz on its outer surface (fig. 16); the 
second joint has two long spines on the inner and one 
on the outer margin; the outer branch is short and 
2-jointed, the marginal spines slender; inner branch 
elongated, first jomt longer than the entire outer 
branch, second about half the length of the first and 
terminating in a single, shghtly curved, claw-like, but 
slender seta, which is as long as the limb itself; the 
inner branch of the second pair (fig. 17) is only 
half as long as the outer, its two joints equal in length 
but the second very narrow and bearing a long, slender, 
terminal seta. The outer branches of the second, 
