Pylopagurus discoidalis (Milne Edwards) 



Figure 109 



Eupagurus discoidalis Milne Edwards, 1880, p. 41. 

 Pylopagurus discoidalis: Milne Edwards and Bouvier, 1893, 

 p. 76, pi. 6, figs. 7-14,. 



Figure 109. — Pylopagurus discoidalis (Milne Edwards). 

 A, anterior part of ovigerous female in dorsal view, 

 eyestalks showing color pattern ; B, right (major) chela 

 of ovigerous female, upper surface showing color pat- 

 tern ; 2 mm. indicated. 



Recognition characters. — Anterior shield of 

 carapace strongly calcined, subcordate, truncate 

 posteriorly; anterior margin with large, sharp- 

 poihted rostrum extending beyond middle of eye 

 scales; lateral projections low and rounded, bor- 

 ders lateral to them very oblique. Eyestalks short, 

 thick, widest distally, much shorter than length of 

 frontal border, slightly exceeding acicles but not 

 reaching middle of terminal article of antennular 

 and antennal peduncles, cornea large; eye scales 

 narrow, lanceolate. Acicles without spines and 

 deflected somewhat outward. 



Chelipeds unequal, right larger than left. Major 

 chela in form of operculum adapted to close open- 

 ings in Dentaliwm shells or similar tubes. Chela 

 flexing at right angle on carpus and incapable of 

 complete extension; upper surface smooth, flat- 

 tened, or slightly excavated, nearly discoidal in 

 outline, surrounded by a raised, finely crenulate 



border; lower surface slightly wrinkled with 

 lines; fingers compressed, internal border of dac- 

 tyl with rounded tubercles; carpus short, dilated 

 in front, external surface ornamented with granu- 

 lations following feebly squamose, irregular lines 

 (occurring also on hand, back of edge forming 

 operculiform portion), and with a few denticles 

 on anterior border. Minor cheliped shorter than 

 right one; chela oval, with very fine denticles on 

 external border; fingers agape at base, and ter- 

 minating in corneous tips; carpus with some 

 spines on crest. Walking legs reaching tip of 

 major chela, dactyls lanceolate with corneous ter- 

 minal claw well developed. 



Measurements. — Length of carapace: male, 

 11 mm. ; female, 10 mm. ; sexual maturity attained 

 at cephalothorax length of 4-5 mm. 



Variations. — The large chelae become more dis- 

 coidal with advancing age (Milne Edwards and 

 Bouvier, 1893). 



Color. — Whitish but with large areas of red- 

 dish on hands, on each article of legs, and a ring 

 of same color near base of eye ; reddish color may 

 extend over anterior portion of cephalothorax 

 (Milne Edwards and Bouvier, 1893). 



Habitat. — The species has been taken from Den- 

 talium shells and from annelid tubes of similar 

 shape; 30 to 508 fathoms. 



Type locality. — Montserrat, 120 fathoms. 



Known range. — Off North Carolina capes, 

 through eastern Gulf of Mexico and West Indies 

 to mouth of Amazon Kiver, Brazil (Provenzano, 

 1963). 



Remarks. — Ovigerous females have been re- 

 corded in November from southern Florida and 

 Brazil. 



Pylopagurus corallinus (Benedict) 



Figure 110 



Eupagurus corallinus Benedict, 1892, p. 23. 



Pagurus corallinus: Hay and Shore, 1918, p. 412, pi. 30, fig. 4. 



Recognition characters. — Anterior shield of 

 carapace subcordate, truncate posteriorly. Ros- 

 trum obtuse, produced beyond rounded, unarmed, 

 lateral projections of front. Eyestalks stout, fall- 

 ing far short of tip of antennular peduncle, larg- 

 est distally, cornea dilated; eye scales sharp 

 pointed, and witli a prominent subterminal spine. 

 Antennal peduncle nearly as long as that of an- 

 tennule; acicle reaching nearly to tip of cornea. 



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FISH AND WILDLIFE SERVICE 



