voto.’ | = PROCEEDINGS OF THE NATIONAL MUSEUM. 241 
* 
aldi, and bearing besides the two spines of that species a third on the 
outer margin behind the anterior angle. 
Maxillipeds much as in macdonaldi. Pterygostomian region armed 
with afew spines. Abdomen carinated, with a median spine on the 
first two segments in both sexes. On each side of the second, third, 
and fourth segments in the female, there is one prominent tubercle, and 
in some cases one or two smaller ones. In the male there are incon- 
spicuous tubercles on either side of the first three segments. 
Chelipeds shorter than the first pair of ambulatory legs; pubescent, 
except the fingers and distal half of the hand, which are smooth. 
Ischium with a few short spines. Merus with four longitudinal, equi- 
distant rows of irregular spines, those of the upper margin being the 
longer. Between these rows are scattered afew small spines. Carpus 
spiny. Hands and fingers shaped as in macdonaldi. Hand with small 
spines on the proximal half of the upper margin, more prominent in the 
male than in the female, and sometimes arranged in two rows, which 
become more divergent toward the distal end, the spines decreasing 
to small tubercles; inner and lower surfaces finely tuberculate or gran- 
wate, with a few stout tubercles in the male at the proximal end of the 
lower margin. 
Ambulatory legs resembling those of macdonaldi; pubescent, except 
the distal two-thirds of the dactyls. Merus of the first pair with a 
longitudinal row of four or five sharp spines on the upper surface, two 
on the outer side of the anterior margin, and six or eight smaller seat- 
tered spines. Meral joints of the remaining legs with a sharp spine on 
the outer side of the anterior margin, and one or more minute spines on 
the anterior portion. Carpal joints of first pair with a few small spines; 
of remaining pairs sometimes with faint tubercles. Other joints un- 
armed. 
Dimensions of male in millimeters, as follows: Length, including 
rostrum, 86; width, without spines, 69; length of cheliped, 114; length 
of first ambulatory leg, 147; length of fourth ambulatory leg, 98. 
There is a small male from the Gulf of Mexico, measuring 52 milli- 
meters long and 36 wide, which differs from the three large specimens 
collected off Cape Lookout, North Carolina, in the following particu- 
lars: The dorsal spines are fewer and longer; there is only one spine on 
the genital region, and one on the anterior margin of the hepatic. The 
rostral spines are proportionally longer and more divergent. In other 
respects, however, this specimen agrees with the types. 
RECORD OF SPECIMENS EXAMINED. 
Cat. No.| Station. | Lat. N. | Long. W. Fathoms.| Nature of bottom. 
|} Oo / “ | / it 
14029 2602 | 34 38 30/75 33 3 124| S.R. 
16053 2403 | 28 42 30) 8 29 00 88 | gy. M. 
| 
16 
