48 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Callinectes ornatus Ordway. 
Callinectes ornatus Ordway, Boston Journ. Nat. Hist., vil, 571, 1863. Rathbun, Proc. TJ. S. Nat. Mus., xviii, 356, pis. xv; 
XXIV, f. 3; xxv, f. 2; XXVI, f. 2; XXVII, f. 2, 1895. 
Carapace rather convex; depressions shallow; length of intramedial area much less than half its 
anterior width. Surface finely and rather evenly granulated. Frontal (inter-antennal) teeth four, 
the two outer obtuse, margins slightly concave; inner teeth small. Subfrontal tooth a prominent 
spine. Suborbital tooth a broad arcuate lobe. Lateral teeth shallow and broad; margins convex at 
base, concave in terminal half; posterior margins longer than anterior; tips acute in first five or six 
teeth, acuminate in remainder. Lateral spine about 2.5 times preceding tooth, directed forward. 
Abdomen of male with penultimate segment widest at proximal end, its margins slightly concave. 
Appendages reach middle of penultimate segment; proximally they curve inward and touch or over- 
lap each other; distal portions straight and divergent, widening a little behind slender tip. Abdomen 
of female very broad at proximal end, tapering more rapidly to terminal segment than in any other 
species. 
Dimensions of male: Length to sinus, 49 mm.; entire length, 51 mm.; width, 105 mm.; length 
of lateral spine, 10.6 mm. ; of preceding tooth, 4 mm. 
South Carolina to Victoria, Brazil; Bermudas. Porto Rico: Mayaguez; Mayaguez Harbor, 7 
fathoms, station 6059; Boqueron Bay; Puerto Real; Guanica; Playa de Ponce; Arroyo; Ensenada 
Honda, Culebra; Hucares; Fajardo. 
Callinectes danse Smith. 
Lupa dicantha Dana, Crust. U. S. Expl. Expect., I, 272, 1852; pi. xvi, f. 7, 1855. 
Callinectes danse Smith, Trans. Conn. Acad. Sci., ii, 7, 1869. Rathbun, Proc. U. S. Nat. Mus., xviii, 357, pi. xvi; xxiv, f. 4; 
xxv, f. 3; xxvi, f. 3; xxvii, f. 3, 1895, and synonymy. 
Intramedial region narrow. Front with two distinct median teeth, small, subacute; lateral teeth 
narrow, acute. Of the antero-lateral teeth of carapace, the second to sixth, inclusive, do not trend 
forward, posterior margin of each tooth not much longer nor more convex than anterior; all teeth 
acute, the seventh and eighth especially so; eighth tooth directed forward. Lateral spine more than 
three times length of preceding tooth. Suborbital tooth rather long and narrow. Penultimate segment 
of abdomen of male very broad at proximal end. The appendages reach to middle or beyond mid- 
dle of penultimate segment and taper regularly to tips; they sometimes touch each other proximally, 
but more often are separated. Abdomen of female similar to that of C. ornatus, but wider in its fifth 
and sixth segments. Costee of chelipeds very closely set with fine granules interspersed with larger ones. 
Length to sinus, 55.5 mm. ; greatest length, 57.5 mm. ; width, 131.5 mm. ; length of lateral spine, 
16.3 mm.; of preceding tooth, 4.5 mm. 
From Indian River Inlet, Florida, to Brazil. Porto Rico: San Juan; Rio Bayamon, above Palo 
Seco; Mayaguez; Mayaguez Harbor, 7 to 1\ fathoms, stations 6058 and 6059; Hucares; Arecibo (C. W. 
Richmond, coll.). 
Callinectes marginatus (A. Milne Edwards). 
Ncptunus marginatus A. Milne Edwards, Arch. Mus. Hist. Nat. Paris, x, 318, pi. xxx, f. 2, 1861. 
Callinectes larvatus Ordway, Boston Jour. Nat. Hist., vn, 573, 1863. Rathbun, Proc. U. S. Nat. Mus., xviii, 358, pi. xvii; 
xxiv, f. 5; xxv, f. 4; xxvi, f. 4; xxvii, f. 4, 1895. 
Callinectes marginatus Rathbun, Proc. Biol. Soc. Washington, xi, 149, 1897, and synonymy. 
Areolations well marked; granules coarse; length of intramedial area a little less than half its 
anterior width. Front four-toothed; median teeth small, more prominent than in C. ornatus; lateral 
teeth obtuse, broader and more arcuate than in C. ornatus. Suborbital tooth prominent, arcuate, 
curved upward. Antero-lateral margin little arched; teeth well separated by deep rounded sinuses; 
the second to fifth, inclusive, have convex posterior margins; first three or four teeth obtuse, the 
remainder sharp. Lateral spine between 2 and 2.5 times the length of preceding tooth. Terminal 
portion of abdomen of male slender; penultimate segment wider at proximal than at distal end, mar- 
gins slightly concave; appendages very short, overreaching third segment but little, or not at all. 
Abdomen of female much narrower than in any other species; terminal segment much longer than 
wide. Costee of manus prominent, with medium granules. 
Dimensions of male: Length to sinus, 43.5 mm.; entire length, 44.5 mm.; width, 96.5 mm.; 
length of lateral spine, 9.5 mm.; of preceding tooth, 4 mm. 
