endopods slender and with long silky hairs. Legs 

 stout, extending beyond carapace; first legs stout- 

 est, remainder progressively more slender; second 

 pair longest; dactyls of first pair somewhat ser- 

 rate on lower border, remainder simple ; fifth legs 

 of females subchelate. Third maxillipeds stout, 

 basal articles prismatic. 



Scyllarus chacei Holthius 



Figure 74 



Scyllarus americanus: Hay and Shore, 1918, p. 389, pi. 28, 

 fig. 2.— Bouvier, 1925 (In part), pp. 448-450, pi. .7, fig. 3. — 

 Boone, 1930, p. 84, pi. 23, fig. A. Schmitt, 1935a (in part), p. 

 174, fig. 39.— Holthuis, 1959, p. 126. 



Scyllarus chacei Holthuis, 1960b, p. 152. 



Recognition characters. — Carapace with sur- 

 face squamose in part dorsally, lightly squamose 

 below lateral borders, with feathered setae (some 

 darkened) between squames; middorsal ridge 

 with anterior (pregastric) eminence large, 

 rounded, gastric eminence higher, upturned, car- 

 diac eminence somewhat smaller than pregastric ; 

 two coalesced spines over each orbit large and 

 somewhat separated from ridges over branchial 

 areas. Rostrum short, rounded, sides nearly paral- 

 lel. Anterior border of carapace emarginate. Or- 

 bits deeply excavated with a broad anterior notch, 

 a blunt tooth on proximal (fixed) antennal arti- 

 cle in center of notch. Anterolateral corners of 

 carapace spiniform, lateral borders roughened 

 with squames; a rather deep notch behind orbit 

 and another one farther back; area between pos- 

 terior marginal groove and posterior margin of 

 carapace nearly smooth but traversed by two, sel- 

 dom three, distinct parallel grooves. 



Second antennular article elongate, flattened 

 above, anterior margin obliquely truncate. Anten- 

 nae spatulate, somewhat punctate; distal article 

 with irregularly rounded anterior border cut into 

 seven elongate, somewhat separated, lobes with 

 rounded ends, edges ciliated; medial two lobes 

 shortest and sharpest, lateral lobe obliquely trun- 

 cate and broadest; penultimate article short, bi- 

 lobed in dorsal view; proximal movable article 

 cordate, a prominent ridge throughout length to 

 spiniform tip, a less conspicuous and irregularly 

 shaped medial ridge, edges spinose. 



Second, third, and fourth abdominal tergites 

 (and to some extent first) with arborescent fur- 

 rows running inward and forward toward mid- 

 line; first to fourth segments with median notch 

 in posterior margin very shallow, fourth segment 



Figure 74. — Scyllarus chacei Holthuis. Male in dorsal 

 view, approximately X 2. Bob Simpson photo. 



not elevated in midline. Third to fifth pleura 

 rounded distally, sixth with a rounded antero- 

 lateral lobe. Sternum triangular, broad at base, 

 smooth with furrows ciliated; male with slight 

 midventral elevation on fifth plate, elevation less 

 evident in female. 



Measurements. — Length of carapace, 19 mm.; 

 length of abdomen 35 mm. 



Habitat. — Nine to 100 fathoms. 



Type locality. — North-northwest mouth of 

 Marowijne River, about 20 miles off coast of Suri- 

 nam. 



Knoion range. — Off Cape Lookout, N.C., 

 through Gulf of Mexico, West Indies, and Carib- 

 bean Sea to off Cape Sao Roque, Brazil. 



MARINE DECAPOD CRUSTACEANS OF THE CAROLINAS 



95 



