426 BULLETIN OP THE BUREAU OP FISHERIES. 



of deep cavities whose rounded moutlis open one on each side of the posterior margin. The front is nar- 

 row, bilobed, and upturned; a short distance back, on the subhepatic region, is a prominent nodose eleva- 

 tion, and a little farther back two others of slightly smaller size. 



Chelipeds short and stout, rough, coarsely granulate and crested along the outer margin; crest of 

 meros with a large distal and a small proximal lobe. 



Length of carapace, 15 mm.; width, 17 mm. 



Color in life, salmon pink with a few purplish spots on the carapace and rusty brown marks on the 

 legs. 



A single adult female of this species was dredged in the channel of Bogue Sound opposite Morehead 

 City on July 14, 1913 , and an adult male was taken from a fish 's stomach at the Blackfish Bank on August 

 1, 1914. The species has heretofore been taken much farther south. 



Tribe BRACHYGNATHA. 



Brachyura having the buccal frame roughly quadrate, the last pair of legs normal 

 in form, rarely reduced in size, and almost never dorsal, the gills few, the first abdominal 

 appendages of the female wanting, and the female openings sternal. 



Both of the subtribes and 8 out of the 18 families of this tribe are represented in the 

 Beaufort fauna. 



Subtribe BRACHYRHYNCHA. 



Brachygnatha having the body oval, circular, or quadrate and broad in front, the 

 rostrum reduced or wanting, and the orbits nearly always well inclosed. 

 This subtribe comprises 14 families, of which 7 are represented here. 



Family PORTUNIDAE. The swimming crabs. 



Brachyrhyncha having the body transversely oval, the last pair of legs more or less 

 distinctly adapted for swimming, and the antennae folding obliquely or transversely. 

 Of the 33 genera assigned to this family 4 are represented here. 



KEY TO THE GENERA OF THE BEAtJFORT REGION. 



a. Carapace with five teeth of about equal size on anterolateral margin; interocular teeth 



three Ovalipes. 



aa. Carapace with nine anterolateral teeth, of which the last is usually much larger than the others; in- 

 terocular teeth four, six, or eight. 



b. Palate without a longitudinal ridge Arenxus. 



bb. Palate with a longitudinal ridge. 



c. Abdomen of male triangular Portunus. 



cc. Last two segments of male abdomen very much narrower than the basal segments. . . . CalKnecies. 



Genus OVALIPES Rathbun. 



Ovalipes Rathbun, 1898, p. 597. 



Plaiyonichus I/atreille, 1S25, p. 151, pt. (not Platyonichus Latreille, 181S, vol. xxvn, p. 4), 



Ovalipes oceUatus ocellatus (Herbst). Lady crab. PI. xxxii, fig. 7. 



Cancer ocellaius Herbst, 1782-1804, vol. HI, heft i, p. 61. 



Portunus pidus Say, 1817. p. 62. 



Platyonichus oceUatus Latreille, 1825, p. 152; H. Milne-Edwards, 1834-1840, t. i, p. 437; Coues, 1871, p. 120; Kingsley, 1878- 



79, p. 321; Smith, 18S6, p. 631: Paulmier, 1905, p. 143: Fowler, 1912. p. 421. 

 Ovalipes ocellatus Rathbun, 1898, p. 597: Sumner, 1911, p. 672. 



Carapace about one-fourth wider than long, convex, finely granulate everywhere except in the 

 median line, where there is a longitudinal band of slightly enlarged granules; front mth three acute 

 teeth , of which the median is about twice as long as the lateral ones. Orbit with one shallow fissure above. 



