cc. Superoexterual surface of chela ridged and not 

 iridescent. 



d. Last pair of legs with posterodistal margin of 

 merus unarmed ; upper margin of dactyl con- 

 spicuously fringed with long hairs 



deprcssifrons (p. 163). 

 dd. Last pair of legs with posterodistal margin of 

 merus armed with spinulous lobe ; carpus of 

 cheliped with inner spine greatly elongated 



sp in ioa rp us (p. 167 ) . 



Portunus sayi (Gibbes) 



Figure 144 



Lupa sayi Gibbes, 1850, p. 178. 



Portunus sayi: Hay and Shore, 1918, p. 428, pi. 33, fig. 2. — 

 Rathbun, 1930a, p. 37, text-figs. 6-7; pi. 14 (rev.). 



Recognition characters. — Carapace nearly 

 twice as wide as long, somewhat tumid, smooth 

 and polished to naked eye, finely granulate under 

 magnification. Six frontal teeth including inner 

 orbitals, two submedian teeth smaller but on a 

 line with next pair. External orbital tooth larger 

 than those of anterolateral border except stout, 

 acute ninth; remaining anterolateral teeth blunt 

 and increasing slightly in size posteriorly. 



Chelipeds of moderate length, somewhat larger 

 in males than in females ; merus with four, rarely 

 three, stout, curved spines in front, none behind ; 

 carpus with two spines ; hand with an acute spine 

 at articulation and a smaller one near base of 

 movable finger; external surface with two longi- 

 tudinal ribs with lowermost extending on finger; 

 superior surface with three ribs continuing on 

 finger, innermost one with fringe of hair beneath. 



Figure 144. — Portunus sayi (Gibbes). Animal in dorsal 

 view, legs of left side not shown, 20 mm. indicated. 



MARINE DECAPOD CRUSTACEANS OF THE CAROLINAS 



Measurements. — Carapace: male, length, 27 

 mm. ; width, 53 mm. 



Color. — Chocolate brown or purplish with 

 cloudings of olive green or light brown and ir- 

 regular white or flesh-colored spots; orange mar- 

 gins on spines of chelipeds. 



Habitat. — Normally this is a pelagic form liv- 

 ing among floating Sargassum, but it is often 

 carried into Beaufort Inlet, N.C., by currents. 



Known range. — North Atlantic Ocean from 

 Nova Scotia south through Gulf of Mexico to 

 Brazil; mid-Atlantic Ocean; Bermuda; Kergue- 

 len Island, south Indian Ocean. 



Remarks. — The species has a fossil record dat- 

 ing from the lower Miocene of North America 

 (Rathbun, 1935). 



Ovigerous females are known from April to 

 August in the southeastern United States and in 

 parts of the West Indies. They are also known 

 from Culebra in February and near Nantucket in 

 September (Rathbun, 1930a, in part). Some of 

 the larval stages were described by Lebour (1944) 

 at Bermuda. Coventry (1944) gave new records 

 for the Bahamas in addition to those listed by 

 Rathbun (1930a). 



Portunus anceps (Saussure) 



Figure 145 



Lupea anceps Saussure, 1858, p. 434, pi. 2, figs. 11-llb. 

 Portunus anceps: Hay and Shore, 1918, p. 431, pi. 33, fig. 8. — 

 Rathbun, 1930a, p. 42, pi. 15 (rev.). 



Recognition characters. — Carapace twice as 

 wide as long, pubescent, and with several indis- 

 tinct, arching, granulate, transverse ridges. Six 

 frontal teeth including inner orbitals, inner orbi- 

 tals blunt and considerably shorter than outer 

 pair of true frontal teeth, submedian teeth short, 

 smaller than inner orbitals. Anterolateral teeth 

 small, acute, curved forward, last one sharp, 

 slender, and about as long as space occupied by 

 four preceding teeth. 



Chelipeds long; merus with four spines in 

 front, a distal one behind; carpus ridged, with a 

 strong internal and a smaller external spine; 

 hand with ridges on outer and superior surfaces, 

 most of ridges continuing on fingers, superoin- 

 ternal ridge more elevated than others, ending 

 distally in two spines, one behind other. 



Measurements. — Carapace: male, length, 13 

 mm., width, 26 mm. ; ovigerous female, length, 15 

 mm., width, 29 mm. 



163 



fe LIBRARY )£] 



