Figure 178. — Ettrypanopeus abbrcviatus (Stimpson). A, 

 male in dorsal view, walking legs not shown ; B, right 

 chela in frontal view ; front with anomalous notch to 

 right of midline; 5 mm. indicated. 



lateral margin thin, divided into four lobes, first 

 and second teeth coalesced, separated by a slight 

 concavity; third tooth obtuse; fourth with outer 

 margin longitudinal or nearly so; fifth subtri- 

 angular, directed outward. A low granulated 

 swelling below interval between first two teeth. 



Chelipeds quite unequal in males; carpus with 

 blunt internal tooth; fingers slender, pointed, 

 widely gaping in major chela; fitting closely in 

 minor, tips crossing in both; major dactyl with a 

 large basal tooth, color of fingers not extending on 

 palm. 



Measurements. — Carapace: male, length, 14 

 mm. ; width, 22 mm. 



Color. — Yellowish or brownish above, front 

 margin of carapace and chelipeds roseate or 

 tinged with bluish purple; fingers black with 

 paler tips. Brazilian specimens with a number of 

 large dark spots on upper half of chelipeds. 



Habitat. — Specimens have been found near 

 shore on oysterbeds, under rocks, and among 

 sponges and bryozoan growth ; shore and shallow 

 water to unknown depth. 



Type locality. — Barbados, British West Indies. 



Known range. — South Carolina, through West 

 Indies and Gulf of Mexico to State of Santa 

 Catarina, Brazil. 



Remarks. — Ovigerous females are known from 

 April to November in the West Indies, and 



August to November in southern Brazil (Rath- 

 bun, 1930a, in part). 



Eurypanopens depressus (Smith). Flat mud crab 



Figures 179, 1831, 



Panopeus depressus Smith, 1869a, p. 283. 



Eurypanopeus depressus: Hay and Shore, 1918, p. 437, pi. 34, 

 fig. 4. — Rathbun, 1930a, p. 410, text-fig. 65, pi. 173, figs. 3-4 

 (rev.). 



Recognition characters. — Carapace transversely 

 oval, approximately three-fourths as long as wide, 

 flattened posteriorly, convex in anterior half; 

 areolations well defined, finely granulate, with 

 several pairs of transverse rows of granulations. 

 Anterolateral teeth four, outer margins granu- 

 late; first two teeth coalesced to form broad lobe 

 with slightly sinuate margin; third tooth blunt; 

 fourth and fifth spines tipped, pointing obliquely 

 upward and forward. Front nearly straight, 

 median notch small or absent. 



Chelipeds dissimilar and quite unequal. Smaller 

 one more rugose than larger and with margins of 

 fingers nearly straight and opposable for a con- 

 siderable distance, with opposed margins of tips 

 thin edged and hollowed out — "spoon shaped." 

 Larger cheliped with nearly smooth articles, hand 

 heavy and inflated; dactyl strongly curved, ob- 

 scurely toothed at base, and meeting immovable 

 finger only at tip; internal tooth of carpus tipped 

 with small spinule; in unworn condition both 

 fingers show indication of spoonlike flattening. 



Measurements. — Carapace: length, 14 mm.; 

 width, 20 mm. 



Variations. — Ryan (1956) described a persist- 

 ent, central, oval, blood-red spot or structure on 

 the inner surface of the ischium of the third 

 maxillipeds of both sexes. The spot is often two- 

 thirds the length of the article, with its surface 

 raised slightly above the surface of the ischium. 

 When pressure is applied, the hard spot cracks 

 and is easily dissected out. A similar spot has 

 been noted on P. herbstii. 



The normal male abdomen is narrow with the 

 third, fourth, and fifth segments fused. A few 

 variant males have wide abdomens with seven 

 segments, resembling females. 



Color. — Mottled grayish olive or dark olive 

 brown, especially on upper surfaces of chelipeds 

 and anterior portions of carapace; fingers dark 

 brown with dark color of immovable finger ex- 

 tended on palm; body and legs light colored un- 

 derneath. 



MARINE DECAPOD CRUSTACEANS OF THE CAROLINAS 



195 



