1895. 



PROCEEDINGS OF THE NATIONAL MUSEUM. 357 



St. Thomas, A. H. Riise (No. 2457, U. S. N. M.). 



Sabanilla, United States of Colombia; str. Albatross (Xo. 18228, U. S. N. M.). 

 Ciirjpt;ao; str. Albatross (No. 7584, U. S. N. M.). 

 Ciimaua, Venezuela; C'apt. Coutliony (Mus. Comp. Zool.). 



Brazil: Maranhao, F. E. Sawyer (No. 18232, U. S. N. M.); Victoria, Hartt and 

 Copelaud, Thayer Expedition (Mus. Comp. Zool.). 



Ordway records this species also from the Tortugas and Haiti. 



Variations. — Brazihau specimens vary a little from typical specimens 

 in the form of their anterolateral teeth; the posterior margins instead 

 of being concave are straight or slightly convex; the teeth, in coiise- 

 (juence, do not api)ear so shallow. In other resjiects these specimens 

 are typical C. ornatus. 



CALLINECTES DANJE. Smith. 

 (Plates XVI: XXIV, tig. 4; XXV, fig. 3; XXVI, fig. 3; XXVII, fig. 3.) 



Lupa dkaittlia, Dana, Crust. U. S. Expl. Exped., I, p. 272, 18.52, pi. xvi, fig. 7, 1855 



(not Lupea dicantha, Milne-Edwakds, 1834). 

 CalUneotes diacanthus, Okdway, Boston Jouru. Nat. Hist., VII, p. 575, 1863. 

 CalUnectes Dana, Smith, Trans. Conn. Acad. Sci., II, p. 7, 1869. 

 Callinectes diacanthus, A. Milne-Edwauus, Crust. R6g. Mex., p. 226, 1879 



(variety oi' CalUnectes diacanihus). 



In general appearance resembles C. ornatus. The intramedial region 

 is, howevei', mnch narrower. The front has two distinct median teeth, 

 small and subacute; lateral teeth narrow, acute. The front resembles 

 that of C. ornatus, but the median teeth are more prominent, the lateral 

 teeth narrower (Plate XXIV, fig. 4). The teeth of the lateral margin are 

 different from those of auy other species with which it is associated. 

 Tbe second to the sixth inclusive do not trend forward as in C. ornatus, 

 C. larvatus, and C. tumidus, — that is, the posterior margin of the teeth 

 is not much longer or more convex than the anterior. The teeth are 

 acute, the seventh and eightli especially so; the eighth tooth is directed 

 forward. Lateral spine more than three times the length of the pre- 

 ceding tooth. Suborbital tooth rather long and narrow. Penultimate 

 segment of male abdomen (Plate XXV, lig. 3) very broad at proximal 

 end. The appendages (Plate XXVI, fig. 3) reach to the middle or 

 beyond the middle of the penultimate segment. They sometimes touch 

 each other proximally, but more often are separated. In length they 

 approach those of C. ornatus, but in C. dancv the appendages taper reg- 

 ularly and do not widen near the tip. The abdomen of the female (Plate 

 XXVII, tig. 3) is similar to thatot C. ornatus, but wider in its fifth and 

 sixth segments. Costiie of chelipeds very closely set with fine granules 

 interspersed with larger one.s. Very small specimens of this species 

 can be separated from C. ornatus by the narrower intramedial region, 

 and from C. larvatus, whicli they superficially resemble, by the outhne 

 of the lateral teeth and the longer sinnes. 



Size. — The largest males are from 5 to 5^ inches wide. The females 

 are much smaller; the largest is 3f inches; one with eggs is 3^ inches 



