THE BEACH YURA AND MACRURA OF PORTO RICO. 
31 
Hexapanopeus caribbaeus (Stimpson). 
Hieropauopc cat'ibbma Stimpso'il, Ann. Lyc. Nat. Hist. N. Y., x, 108, 1871. 
Eurypanopeus caribbxus Hath bun, Ann. Inst. Jamaica, i, 20,1897. 
Hexapanopeus caribbxus Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, iv, 273, 1898. 
Carapace with regions well marked; protogastric, branchial, and cardiac regions elevated; gastric 
and branchial crossed by prominent transverse granulated lines. A well-marked sinus between first, 
and second lateral teeth, which are small and blunt; third and fourth large and prominent; third 
acute, fourth spiniform; carapace widest at fourth tooth, fifth minute. Fronto-orbital border two- 
thirds and front one-third the width of carapace. Front produced, median notch a well-marked V, 
lobes sinuous. Eyes large. Chelipeds finely granulate, a few tubercles on carpus, fingers elongate, 
strongly bent down, sharp, finely dentate (dactylus with a larger tooth at base), not gaping, the color 
of pollex continued extensively on palm. Ambulatory legs slender. 
A small species. A male of good size measures 8.3 mm. long; 11.6 mm. wide; fronto-orbital 
width, 7.5 mm.; frontal width, 3.9 mm. 
Jamaica; St. Thomas; Trinidad; Sabanilla, United States of Colombia. Porto Rico: Boqueron 
Bay; Hucares. 
Hexapanopeus hemphillii (Benedict & Rathbun). 
Panopeus hemphillii Benedict & Rathbun, Proe. U. S. Nat. Mus., xiv, 374, pi. xxiv, figs. 12 and 13, 1891. 
Hexapanopeus hemphillii Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, iv, 273, 1898. 
Carapace with regions distinctly indicated, epigastric lobes prominent, a few blunt transverse 
ridges, surface also finely granulate. First and second teeth small but well separated. Third to fifth 
teeth thickened, blunt, dentiform, fifth smaller than others, but still of fair size. Fronto-orbital border 
five-sevenths and frontal border more than one-third of greatest width of carapace. Median notch a 
deep narrow V, lobes nearly straight viewed from above, denticulate. Chelipeds granulate, very 
unequal; carpus uneven, with an anterior groove, inner tooth strong. Manus with a deep superior 
groove, surface rugose above. Fingers of large cheliped strong ( dactylus with large basal tooth) , those 
of smaller cheliped longer, slenderer, and deflexed; color not extending on palm. 
Length of large male, 5.5 mm.; width, 7 mm.; fronto-orbital width, 5 mm.; frontal width, 2.5 mm. 
Florida Keys; St. Thomas. Mayaguez Harbor and Puerto Real, Porto Rico. 
Hexapanopeus quinquedentatus, sp. nov. 
Carapace deeply areolated, the regions separately convex, granulate; epigastric lobes prominent. 
The antero-lateral margin has five well-marked teeth, second separated from first by a deeper sinus 
than is usual in this and allied genera. Third, fourth, and fifth 
teeth larger, similar to one another, thickened, subacute. Front 
with a median V, lobes slightly oblique, nearly straight. Cheli- 
peds not very heavy, slightly unequal in male, equal in female, 
coarsely granulate. Carpus uneven; a short and very deep ante- 
rior groove. Manus deeply grooved above; fingers deeply 
grooved, the intervening ridges partly granulate; tips acute; fin- 
gers not gaping; dactylus of larger cheliped of male with a large 
basal tooth. Legs granulate along anterior margin. There are 
seven distinct segments in abdomen of male (at least in immature 
specimens), while in other species of the genus, the third to fifth 
. Fig. 6 . — Hexapanopeus quinquedentatus. 
are fused. (a) Female, outline of carapace, x 4. ( b ) 
The largest specimen taken is a female, 5.5 mm. long; 7.4 Male, right chela, x to. 
mm. wide; fronto-orbital width, 5 mm.; frontal width, 2.4 mm. 
Type locality, Mayaguez, 1 female (Cat. No. 23769). Also taken at Mayaguez Harbor, 12 fathoms, 
station 6060, I female; off Puerto Real, 8.) fathoms, station 6074, 1 immature male; off Boca Prieta, 8| 
fathoms, station 6085, 1 immature male. 
