THE CANCROID CRABS OF AMERICA 19 



Basal article of antennules advanced and visible dorsally between 

 frontal teeth. Chelipeds elongate. Terminal article of last pair of 

 legs broadly oval, rounded at extremity. Abdomen of male oblong. 

 Nova Scotia to Gulf of Mexico; South America from Peru and 

 Uruguay southward; South Africa; eastern Asia; Australia and New 

 Zealand. 



KEY TO THE SPECIES OF THE GENUS OVALIPES 



A'. Three frontal teeth between orbits. Lateral teeth of carapace widely 

 separated. No tooth on upper margin of orbit. 

 B'. Carapace covered with minute color dots arranged in small annular clus- 

 ters; granules enlarged along median line. Outer surface of palm, 



nearly smooth ocellatus ocellatus, p. 19. 



B2. Carapace of a uniform color, without spots; granules not enlarged along 



median line. Outer surface of palm rough, ocellatus guadulpensis, p.23. 



A^, Four frontal teeth between orbits. Lateral teeth of carapace broad, narrowly 



separated. A strong tooth on upper margin of orbit punctatus, p. 24. 



OVALIPES OCELLATUS OCELLATUS (Herbst) 



LADY CRAB; SAND CRAB; CALICO CRAB 

 Plates 2 and 3 



Cancer ocellatus Herbst, Natur. d. Krabben u. Krebse, vol. 3, pt. 1, 1799, p. 61, 

 pi. 49, fig. 4 (type-locality. Long Island near New York; type not extant). 



Portunus pictus Say, Journ, Acad. Nat. Sci. Philadelphia, vol. 1, 1817, p. 62 

 (type-locality, "sandy shores of the sea" [eastern United States]: type not 

 extant) . 



Platyonichus ocellatus Latreille, Encyc. Meth., Hist. Nat., Insectes, vol. 10, 

 1825, p. 152.— Db Kat, Nat. Hist. New York, pt. 6, Crust., 1844, p. 9, 

 pi. 1, fig. 1; pi. 5, fig. 7. — Smith, Rept. U. S. Commr. Fish & Fisheries, 

 vol. 1 for 1871 & 1872 (1873), pp. 338 [44], 533 [239], 547 [253].— R. Rathbun, 

 Fisheries & Fishery Industries of U. S., sec. 1, 1893, p. 774, pi. 266. 



Ovalipes ocellatus M. J. Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 597; 

 Occas. Papers Boston Soc. Nat. Hist., vol. 7, 1905, p. 9. 



Ovalipes ocellatus ocellatus Hay and Shore, Bull. Bur. Fisheries, vol. 35, 1915-16 

 (1915), p. 426, and synonymy. 



Diag7iosis. — Three frontal teeth. Lateral teeth widely separated. 

 No tooth on upper margin of orbit. Color dots of carapace arranged 

 in small annular clusters. Outer surface of palm nearly smooth. 

 Male abdominal segments 3 to 5 fused. 



Description. — 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 with three 

 acute teeth, the median about twice as long as the lateral ones. 

 Orbit with one shallow fissure above. Antero-lateral teeth strong, 

 acute, directed forward. Inner suborbital angle projecting as far 

 as the median tooth. Pterygostomian region with a long curved 

 stridulating ridge made up of approximately 50 close set striae whicli 

 narrow into tubercles at the inner end of the ridge; a short comple- 

 mentary ridge exists at the proximal end of the inner margin of the 



