198 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



KEY TO THE AMERICAN SPECIES OF THE GENUS CALAPPA 



A'. Carapace without a spine at either end of posterior margin, the 

 extremities produced downward or inward on either side of 

 first abdominal segment. 

 B^ No deep hollow between gastric and hepatic regions. 



C^. Carapace widest behind middle. Proximal tooth of manus 

 dentiform, its margin pointed or angled. 

 Di. Carapace broad, at least one and one-half times broader 

 than long. 

 E^ Posterior third of carapace without short transverse 

 granulated ridges. 

 F^ Posterior teeth of lateral wing obtuse, blunt; a con- 

 cave longitudinal strip on lower half of manus. -flammea (p. 198) 

 F*. Posterior teeth of lateral wing pointed; the smooth 

 longitudinal strip on lower half of manus bent 



distally upward at an obtuse angle springer! (p, 205) 



E*. Posterior third of carapace with short transverse granu- 

 lated ridges. Surface covered with fine dots of color 



on a dark ground convesa (p. 206) 



D*. Carapace narrow, not more than one and one-fourth times 

 broader than long. 

 E^ Surface coarsely and nearly evenly granulate; tuber- 

 cles high, subacute saussurei (p. 206) 



E*. Surface finely granulate; tubercles low, rounded. 



angusta, adult (p. 210) 

 C. Carapace widest in front of middle. Proximal tooth of 

 manus lobiform, its margin arcuate, not pointed or an- 

 gled angusta, young (p. 210) 



B^. A deep hollow between gastric and hepatic regions. Posterior 

 third of carapace covered with short transverse granulated 



lines gallus (p. 214) 



A*. Carapace with a prominent horizontal tooth at either end of 

 posterior margin. A sharp spine at angle of posterolateral 

 wing and another at proximal end of manus sulcata (p. 211) 



ANALOGOUS SPECIES OF CALAPPA ON OPPOSITE SIDES OF THE CONTINENT 



Atlantic Pacific 



flavimea. convexa. 



angusta. saussurei. 



CALAPPA FLAMMEA (Herbst) 



Plate 59, Figures 1, 2; Plate 60, Figure 1 



Cancer chelis crassissimis Catesby, The natural history of Carolina, Florida and 

 the Bahama Islands, ed. 1, vol. 2, p. 36, pi. 36, lower figure, 1743; ed. 2, 1771. 



Cancer granulatus Linnaeus, Systema naturae, ed. 10, vol. 1, p. 627, 1758 

 (America: Mus. de Geer); Systema naturae, ed. 12, vol. 1, part 2, p. 1043, 

 1767 (part) .23 — Geo. Edwards, in Catesby, The natural history of Carolina, 

 Florida and the Bahama Islands, ed. 2, vol. 2, p. 36, pi. 36, lower figure, 1771. 



" In Systema Naturae, ed. 10, Linnaeus refers to Catesby's figure of the American Calappa (flammea or 

 marmorata of authors) and says "Habitat in America. Mus. De Geer." In ed. 12, he says "Habitat in 

 America. Mus. de Geer ex Algiriamihi." From this we infer that the locality "America" was taken from 

 Catesby and that LLnnaeus's type of Cancer granulatus was Mediterranean. 



