448 BULLETIN OF THE BUREAU OF FISHERIES. 



Genus PLANES Bowdich. 



Planes Bowdich, 1825, p. is. 

 Planes minutus (Linnaeus). Gulf-weed crab. PL xxxvi, fig. 6. 



Cancer -minuius Linnseus, 1758, p. 625. 



Grapsus minutus Latreille, 1803. p. 68. 



Planes dypeatus Bowdich, 1825, p. is. 



Nantilograpsus minutus H. Milne-Edwards, 1834-1840, t. n, p. 90; De Kay, 1844, p. 15. 



Planes minutus. White, 1847, p. 42; Verrill, 1908, p. 325; Sumner, 1911, p. 675; Fowler, 1912, p. 14&-141. 



Carapace quadrilateral, as wide as long, depressed, smooth, and with a shallow foveola or longi- 

 tudinal groove between the orbits; front decurved, usually slightly emarginate in the middle, its 

 edges minutely denticulate or smooth; orbits large; outer orbital angle spiniform and behind it a 

 small sinus. 



Eyes large, on stout stalks. Chelipeds large and heavy; chelae inflated and smooth, the immovable 

 finger bent downward, movable finger curved, both with blunt teeth throughout their length; carpus 

 with a strong spine on inner face; meros and ischium with a thin serrate crest along the inner margin, 

 which terminates at the distal end of the meros in two or three spines. Walking legs with brown, 

 homy dactyls and a few minute denticles. 



This little crab is truly pelagic and of world-wide distribution. It is occasionally found along 

 the outer beach and more rarely in the harbor on floating planks and logs covered with goose barnacles. 

 It is of a reddish-fawn color, more or less blotched with dark brown, and usually has a small white spot 

 on each side or a large white spot on the front of the carapace. 



Genus EUCHIRO GRAPSUS A. Milne-Edwards. 



Euckirograpsus A. Milne-Edwards, 1853, p. 175 (141). 



Euchirograpsus americanus A. Milne-Edwards. PL xxxvi, fig. 7. 



Euckirograpsus americanus A. Milne-Edwards, 1880, p. 18. 



Carapace flattened, subquadrate, the length and width about equal, the lateral borders nearly 

 straight and parallel; surface finely granulate and with a few very short, fine hairs visible only with 

 a lens; front somewhat produced, lamellate and rather broadly notched. There is a small shoulder 

 at the inner canthus of the orbit. The external orbital angle is spiniform, and behind this, on the 

 margin of the carapace, are three smaller spines, of which the first and third are less developed than 

 the second. 



Chelipeds stout; the meros with a dentate crest below; the hand with longitudinal granulate 

 ridges, those of the upper surface with hairs. Ambulatory legs strong, long, and with flattened, spiny 

 meral articles, the dactyli with five or six strong spines, of which the distal three are especially promi- 

 nent at the tip of the leg. 



Length of carapace, 8 mm.; width, 8.25 mm. 



Color, light brown, the legs with five or six bands of red. 



One specimen, a young female, was taken by the Fish Hawk in 47 fathoms about 25 miles ofE Cape 

 Lookout. 



Genus SESARMA Say. 



Sesarma Say, 1817, p. 76. 



KEY TO THE SPECIES OF THE BEAUFORT REGION. 



a. Lateral margin of carapace with a tooth behind the outer orbital tooth ; body strongly 



convex above reticulata. 



aa. Lateral margin of carapace without a tooth behind the outer orbital tooth ; body 



nearly flat above citierea. 



Sesarma reticulata Say. Marsh crab. PL xxxvi, fig. 12. 



Sesarma reticulata Say, 1817, p. 73; Gibbes, i8so, p. 180; Smith, 1S69, p. 156; Coues, 1S71, p. 121; Kingsley, 1878-79, p. 

 323; Sumner. 1911, p. 675: Fowler, 1912. p. 440, pi. 139. 



Carapace rectangular, about one-fourth wider than long, convex, regions distinct, siuiace punctate 

 and with scattered clumps of setae above and in front; obliquely striate and setose on the posterolateral 



