46 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
fissures. Chelipeds triangular prismatic, pubescent; arm ciliated and armed with five spines in front 
and a spine at its outer extremity. Carpus slender, provided inside with a slender, sharp spine and a 
smaller spine on outside. Hand remarkably short and compressed, a raised crest above, a spine near 
wrist and another near finger; surface finely scabrous. Finger surmounted by a border of hairs. 
Ambulatory legs slender; those of first pair ciliated below; those of second and third pairs smooth; 
last pair much shorter than third. 
Carapace speckled and marbled with grayish purple, more brilliant toward middle; a dark median 
spot on the intestinal region; hairs of fingers of the chelipeds red, denticulations carmine (A. Milne 
Edwards). Of the six specimens taken by the Fish Hawk and preserved in alcohol, two, a male ami 
a female, have much darker carapace than the others. In these as well as in a smaller light-colored 
specimen, the ambulatory legs of first pair are much darker than the other legs; fringe of hair on their 
lower and anterior edge crimson. Similar hairs border the inner margin of the carpus and the upper 
margin of the dadtylus of the chelipeds; prehensile teeth also crimson. 
Dimensions o') male: Entire length, 24.7 mm.; entire width, 39.7 mm. 
South Carolina; Bahamas; Florida Reefs; Caribbean Sea; Bermudas. Culebra ( Fish Hawk). 
Portunus (Achelous) ordwayi Stimpson. 
Achelous ordwayi Stimpson, Ann. Lyc. Nat. Hist. N. Y., vn, 224, 1860. 
Nepiunus ordwayi A. Milne Edwards, Crust. Rt'g. Mex., 217, pi. XL, f. 2, 1879. 
Carapace narrow. Surface pubescent, and with rounded granulations on raised portions and near 
lateral borders. Front much advanced, rather narrow, and with four narrow teeth besides the sharp 
orbital angles; the median exceed a little the lateral, which are turned slightly outward. Orbits large, 
their superior border very concave. Of the antero-lateral teeth the first are wider at base than the last; 
the ninth is tv ice as long as the preceding in full-grown specimens, and its point is curved forward a 
little. Postero- lateral borders short and very concave. The epistomial spine does not exceed the 
front. Merus of outer maxillipeds strongly narrowed forward, its inner angle cut obliquely for insertion 
of palpus. Chelipeds small, but. armed with very sharp spines; on the margins are long hairs which 
nearly conceal the spines. The arm has four spines in front and one behind, the wrist with one long 
spine inside and a small spine outside; hand surmounted with two spines, one above articulation 
with the preceding article, the other near anterior third of upper margin. This margin is in the form 
of a raised carina. Three other carinfe on outer surface of palm. Fingers narrow and channeled. The 
ambulatory feet are compressed and have very long and styliform dactyli. Sternal plastron rugulose, 
as are also the first segments of the abdomen. 
Red or pale brown in dots; gastric region usually very deep crimson. Some mother-of-pearl 
reflections especially noticeable on the upper surface of the hands (A. Milne Edwards). 
Length of female, to sinus, 25 mm.; extreme length, 26.2 mm.; extreme width, 40.3 mm. 
Bahamas; Florida Straits; Gulf of Mexico; Antilles; Abrolhos Islands, Brazil; Bermudas. Porto 
Rico: Mayaguez; off Culebra, 14| fathoms, station 6086; off Vieques, 16 fathoms, station 6092; off 
Humacao, 12£ fathoms, station 6098. 
Portunus (Achelous) sebae (Milne Edwards). 
Lupea scbx Milne Edwards, Hist. Nat. Crust., I, 455, 1834. 
Nepiunus sebas A. Milne Edwards, Arch. Mus. Hist. Nat. Paris, x, 329, pi. xxvm, f. 2, 1861. 
Carapace convex in middle, sloping gradually down to lateral margins. Width, exclusive of 
spines, about 1.5 times length. Antero-lateral teeth sharp, tips turned forward, lateral spine, longer 
than the space occupied by the three next teeth. Of the four frontal teeth, the median pair are blunt, 
more advanced than the second pair, which are acute. The inner orbital tooth is also acute, its outer 
margin sinuous. Merus of chelipeds with five anterior spines and one posterior subterminal spine. 
Carpus with a long inner spine and a short outer one. Manus compressed, with a long spine at articu- 
lation with carpus, and two superior spines, one of which is terminal and one at distal third of upper 
margin. Ambulatory legs narrow; swimming feet with an erect spine on basal joint (peculiar to 
this species); merus with a posterior distal spine. 
On either side of carapace near middle of postero-lateral margin there is a large circular red spot. 
Dimensions of male: Entire length, 29.5 mm.; entire width, 55.2 mm.; width at sinus in front of 
lateral spine, 42.5 mm. 
North Carolina; Gulf of Mexico; Antilles; Brazil; Bermudas. Puerto Real and Boqueron Bay, 
Porto Rico. 
