THE CANCROID CRABS OF AMERICA 99 



F^ Median frontal teeth one-third the size of outer pair. 

 Anterior width of intramedial area twice its length. 

 Appendages of male abdomen reach or nearly reach 

 last segment, tips slightly curved _arcuatus, p. 121. 

 F^. Median frontal teeth very small. Anterior width of 

 intramedial area more than twice its length. Ap- 

 pendages of male abdomen very short, overreaching 

 third (or coalesced) segment but little if at all. 



marginatus, p. 123. 



D^. Intramedial area longer than its posterior width. Frontal 



teeth large, typically blunt and rounded. Appendages of 



male abdomen reaching nearly to end of terminal segment. 



toxotes, p. 127. 



C^. Lateral spine of carapace not more than twice length of posterior 



margin of preceding tooth. 



D^ Antero-lateral region of carapace smooth, nongranulate. 



Frontal teeth typically broadly rounded. Appendages of male 



abdomen reaching end of terminal segment bocourti, p. 128. 



D^. Antero-lateral region granulate. Frontal teeth triangular. 

 Appendages of male abdomen reaching middle of penulti- 

 mate segment exasperatus, p. 130. 



ANALOGOUS SPECIES ON OPPOSITE SIDES OF THE CONTINENT 



Atlantic Pacific 



sapidus acuiidens bellicosus 



danae arcuatus 



bocourti toxotes 



CALLINECTES SAPIDUS Rathbun 



BLUE CRAB; COMMON EDIBLE CRAB 

 Plate 47 



Lupa hasiaia Say, Journ. Acad. Nat. Sci. Philadelphia, vol. 1, 1817, p. 65, in 

 bays, etc. [east coast United States]; p. 443, St. John River, Florida. Not 

 L. hastata Desmarest, 1823 = Concer hastat^is Linnaeus, 1767, Adriatic. 



Portunus diacaniha Latreille, Encyc. Meth., Hist. Nat., Insectes, vol. 10, 

 1825, p. 190 (variety only) (type-localities of diacantha, North America, 

 Antilles, Brazil, etc.; types not extant). 



? Lupea dicaniha Milne Edwards, Hist. Nat. Crust., vol. 1, 1834, p. 451 (part). 



Lupa dicantha Gould, Invert. Ma.ssachusetts, 1841, p. 324. — De Kay, Nat. 

 Hist. New York, Zool., pt. 6, Crust., 1844, p. 10, pi. 3, fig. 3. 



Callinedes hasiatus Ordway, Journ. Boston Soc. Nat. Hist., vol. 7, 1863, p. 

 568.— A. Milne Edwards, Crust. Reg. Mex., 1879, p. 224 (variety of C. 

 diacanthus). — R. Rathbun, Fisheries and Fishery Industries of the U. S.. 

 sec. 1, 1884, p. 775, pi. 267. 



Callincctes sapidus Rathbun, Proc. U. S. Nat. Mus., vol. 18, 1895 (1896) p. 

 3,52, pis. 12; 24, fig. 1; 25, fig. 1; 26, fig. 1; 27, fig. 1.— Hay and Shore, 

 BuU. Bur. Fisheries, vol. 35, 1915-16 (1918), p. 432, pi. 35, fig. 1.— Piers, 

 Proc. Nova Scotia Inst., Hahfax, vol. 15, 1923, p. 83; Cow Bay, near 

 Halifax. 



Diagnosis. — Frontal teeth two. Appendages of first segment of 

 male abdomen reach extremity of abdomen. 



