NO. 3536 DECAPOD CRUSTACEANS — CHACE 643 



tubercles, but without continuous marginal line dividing outer and 

 inner faces; distinct longitudinal line running nearly entire length of 

 outer siulface of propodus near lower margin ; palm about one and one- 

 half times as high as length of superior surface; movable finger longer 

 than height of palm; fingers narrowly gapmg, except where mterrupted 

 by large, triangular tooth near middle of fixed finger; inner surface of 

 palm very famtly rugose, with stronger striae near upper and lower 

 margins. Merus of walkmg legs with small, subdistal spine on 

 dorsal margin and with two or three triangular teeth at distal end of 

 posterior margin ; plumose setae covering much of anterior siu-f aces of 

 carpus and propodus of first leg, becoming progressively sparser on 

 second and third legs, and absent from last leg; second and thu-d legs 

 subequal, one and thi'ee-fourths times as long as carapace; first and 

 fourth pairs subequal, shorter. 



Terminal somite of male abdomen broadly triangular, with famtly 

 sinuous margins (somewhat foreshortened in figiu-e) ; margins of 

 penultimate somite diverging slightly before convergmg strongly to 

 distal margin. Broadly sickle-shaped end pieces of gonopods showmg 

 faintly through appressed abdomen. 



Color: In ethyl alcohol, carapace mottled grayish brown, with all 

 transverse striae dark brown; chelipeds dark reddish brown dorsally, 

 fading to light tan on outer surface of palm and to nearly white near 

 tips of fingers; walking legs mottled with browm, gray, and tan, 

 proximal and distal ends of propodus and proximal end of dactyl 

 nearly w^hite, giving banded appearance to legs; conspicuous whitish 

 patches on both sides of dactyl of chelipeds and walking legs, near tips 

 of fingers of chelipeds, on lower surface of eyestalks, and at both 

 ends of epistome at junction with inner end of lower margin of orbit. 



Measurements: Carapace of male holotype, 10.3 mm. long, 13.1 

 mm. wide. Carapace lengths of male paratypes, 3.7-12.0 mm.; of 

 females without eggs, 3.1-10.7 mm.; of ovigerous females, 3.2-12.4 

 mm. 



Remarks: The general appearance of this crab, mcluding the smuous 

 front and the plumose setae on the anterior sm"f aces of the first walk- 

 ing legs (noted by Holthuis, 1959, p. 240), is very similar to that of 

 Pachygrapsus transversus (Gibbes, 1850). Comparison of St. Helena 

 material with specimens of P. transversus from the eastern and western 

 Atlantic and the eastern Pacific shows that P. loveridgei differs m 

 having the dorsal surface of the carapace mflated and evenly convex, 

 rather than flattened or depressed on the cardiac region; m having 

 the transverse striae on the anterior half of the carapace more numer- 

 ous and crowded; in lacking the longitudinal crenulate line that 

 extends over the entire length of the upper surface of the palm in P. 

 transversus; and in having the chitinous terminal portion of the 



