_ PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. oT 
Sympagurus, gen. nov. 
The single species of the genus here proposed is readily distinguished 
from Parapagurus by the shortness of the peduncles of the antennule 
and the well developed eyes, in which respects it agrees essentially with 
Eupagurus. It differs essentially from Parapagurus in having phyllo- 
branchiz, which are the same in number and arranged inthe same way as 
in Parapagurus and Eupagurus, but differ much from the branchize of 
Eupagurus and the ordinary Paguroids in having the lamelle long, nar- 
row, attached by one end to the narrow stem of the branchia and arranged 
in two loosely packed longitudinal series either side of the axis of the 
branchia. At the extremity of the branchix, however, the lamell 
become very narrow, and at the extreme tips apparently papilliform as 
at the tips of the branchie of Parapagurus. The oral, thoracic, and 
abdominal appendages are essentially as in Parapagurus, the sexual 
appendages of the first and second somites of the abdomen of the male 
are, however, much smaller and less perfectly developed. 
Sympagurus pictus, sp. nov. (Pl. 5, Figs. 2, 2a; Pl. 6, Figs. 5-8.) 
The carapax is divided by a deep, cervical suture, which is arcuate 
as in Parapagurus pilosimanus, but is narrowed anteriorly much more 
than in that species, the breadth at the bases of the antenne scarcely 
equaling the length in front of the cervical suture. The anterior margin 
projects in a prominent triangular rostrum with a distinct longitudinal 
carina, and either side is considerably oblique, with only a slight 
prominence between the base of the eyestalk and the peduncle of the 
antenna. 
The eyestalks, including the eyes, are about two-fifths as long as the 
carapax along the dorsal line, stout, aud expanded at the very large 
black eyes, which are terminal, not oblique, compressed vertically, and 
from two-fifths to nearly a half as broad as the length of the stalks. 
The ophthalmic scales are small, spiniform, and acute as in Parapagurus 
pilosimanus. 
The peduncle of the antennula is a little longer than the breadth of the 
carapax in front, the second segment reaches to the tip of the eye, and 
the ultimate segment is about half the entire length. The upper flag- 
ellum is about as long as the ultimate segment of the peduncle, while 
the lower is only about half as long, slender, and composed of seven or 
eight segments. The peduncle of the antenna reaches slightly by the 
eye and the ultimate segment is nearly twice as long as the penultimate. 
The acicle is slender, sparsely setigerous, and reaches to the tip of the 
peduncle, and outside its base there is a dentiform process, but no 
tooth or spine inside. The flagellum is nearly naked and about four 
times as long as the carapax. 
The oral appendages are all nearly as in Parapagurus pilosimanus, 
except that, in the second maxilla, the endognath is broader at the 
base, the anterior lobe of the scaphognath is shorter and broader, 
though still triangular at the tip, and the posterior lobe is shorter, 
