1895. PBOCEEDINGS OF THE NATIONAL MUSEUM. 365 



Mexico; Mexican Commission, World's Colnnibian P^xposition (No. 18(531. U.S. 



N. M.). 

 (fnayaquil, Ecuador; I'rof. .lames Orton ; one male (Peabody Mus., "^'.'ile l^niv.). 



The C. robustns of Milne-Edwards, wliicli T thiidv was based on worn 

 examples of C toxotes, is recorded from the I'aciflc coast of the United 

 States of Colombia. 



CALLINECTES BELLICOSUS (Stimpson). 

 (Plates XXII; XXIV, fio. 10; XXV, tig. 8: XXVI, fig. 8.) 



Lupa hellicosa (Si.oat MS.) SxiMrsoN, Ann. Lye. Nat. Hist. N. Y., VII, ip. 57, 



1859. 

 Calliiiecfes hcUicosiis, Ordway, Boston .Fonrn. Nat. Hist. VII, p. 577, 1863. 

 Calliuectes hellicosiis, A. Mii.ne-Edwards, Crust. R6g. Mex., p. 227, 1879 (variety 



of CalUnectes diacaiithiin). 



Carapace moderately convex, granules fine and very closely set. 

 Areolations less distinct than in C. areuatus. Length of intramedial 

 region less than one-half its anterior width. Front (Plate XXIY, tig. 

 10) with two slender sharp teeth, widely separated, and between them 

 two very faintly marked median teeth. Submedian tooth sharp, longer 

 than the lateral i)air. The inner supraorbital tissure is open, often 

 throughout its length. Border of the orbit outside the tissure advanced 

 beyond that portion inside the fissure. Suborbital tooth slender, well 

 advanced and sharp. Anterolateral teetfli with sides more or less con- 

 cave and sharp white tips. The lateral spine is very short; in adults 

 less than twice the length of the preceding tooth, in half-grown speci- 

 mens about twice the length, and in young specimens more than twice. 

 The penultimate segment of the abdomen of the male (Plate XXV, fig. 

 8) is broad at the base, and constricted in its proximal half. The 

 appendages reach nearly to the extremity of the penultimate segment; 

 they have a double curve (Plate XXVI, fig. 8), the curve being stronger 

 in a vertical direction than in a horizontal. The merus of the chelipeds 

 has four spines on its inner margin; a fifth spine, grading in size and 

 position with these, is situated on the condyle of the ischium. The 

 lidge on the outer and upper margin of the inanus is very prominent 

 and marked with large tubercles, which in one nearly full-grown male 

 are spiniform. The other costa? of the manus are less strongly marked, 

 and are often almost smooth. 



Size. — The largest male is "),% inches wide, or 134 mm., with a length 

 to tlie sinus of 64 mm. The frontal spines are broken. The largest 

 females are immature or sterile, having a triangular abdomen. The 

 dimensions are as follows: Length to sinus, male 4(1 mm., female 42; 

 entire length, male 48 mm., female 43.5; width, male !>7 mm., female S(». 



Thelocalities from which specimens havebeen examined are asfollows: 



Lower California and Gulf of California, U. S. Fish Commission Str. Albatross, 

 1889: San Bartolome Bay ; Magdalena Bay; La Paz Harbor; San Josef Island; 

 Carmen Island; Concepcion Bay; Gnaymas; San Luis Gonzales Bay; St. 

 George's Bay; Shoal Point, Colorado River. 



La Paz, Lower Califoraia; L. Belding (No. 4630, U. S. N. M.). 



