274 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [568] 
with a geniculation at the articulation of the fourth with the fifth seg- 
ment; terminal portion, corresponding to the flagellum, composed of 
three closely articulated segments, besides a minute apical one; mandi- 
ples slender, without palpi; exposed portion of the maxillipeds formed 
of only two segments; the basal one with a narrow, elongated portion, 
which is abruptly narrowed at the articulation of the terminal segment, 
and sends a slender process beneath it to the middle of its inner margin ; 
the terminal segment much narrower than the basal, and tapering 
toward the extremity; legs subequal, the posterior not shorter than 
the others; terminal segment of the abdomen produced between the 
posterior caudal appendages, which are short and essentially as in the 
allied genera. 
This genus differs from Scyphax most notably in the form of the max- 
illipeds, which in S ‘yphax have the terminal segment broad and serrately 
lobed, while in our genus it is elongated, tapering, and has entire mar- 
gins. In Scyphawx, also, the posterior pair of thoracic legs are much 
smaller than the others, and weak ; the last segment of the abdomen is 
truneated at the apex, and the articulations between the segments of 
the terminal portion of the antennze are much more complete than in our 
species. The general form and appearance of the genera are the same, 
and the known species agree remarkably in habits, the Scyphaxr, accord- 
ing to Dana, occurring on the beach of Parua Harbor, New Zealand, 
and found in the sand by turning it over for the depth of a few inches. 
ScyPHACELLA ARENICOLA Smith, sp. nov. (p. 337.) 
Body elliptical; abdomen not abruptly narrower than the thorax; the 
whole dorsal surface, except the extremity of the abdomen, covered with 
small, depressed tubercles, which give rise to minute spinules; eyes 
prominent, round; antenna alittle longer than the breadth of the body ; 
first and second segments short, equal; third, fourth, and fifth succes- 
sively longer, the fifth being rather longer than the. terminal portion, 
which is more slender than the fifth segment, tapers regularly to the 
tip, and is composed of three successively much shorter segments, and 
avery short, somewhat spiniform, but obtuse, terminal one ; all the seg- 
ments, except the minute terminal one, scatteringly beset with spinules; 
legs beset with small spines; the ischial, meral, carpal, and. propodal 
segments subequal; terminal process of the last segment of the abdo- 
men narrow, triangular, with the apex slightly rounded, and the dorsal 
surface a little concave; posterior caudal appendages much shorter than 
the abdomen; rami slightly unequal, the outer stout, spinulose, the inner 
a little shorter and much more slender. 
Color, in life, nearly white, with chalky white spots and scattered, 
blackish dots arranged irregularly. Eyes black. 
Length, 3-4™™. 
Found at Somers’s and Beesley’s Points, on Great Egg Harbor, New 
Jersey, in April, 1871, burrowing in the sand of the beaches, just above 
