NO. 3 GARTH : SOME NEW SPECIES OF BRACHYURAN CRABS 73 



likely to be confused with Cryptopodia hassleri Rathbun (1925), the 

 chelae of which, however, are subequal and the laminate margins of 

 which extend far beyond the walking legs. 



PORTUNIDAE 



Genus PORTUNUS Weber 

 Subgenus PoRTUNUS 



Portunus (Portunus) acuminatus Stimpson 

 Plate 19, Figs, 1-3 



Achehus acunmiatus Stimpson, Ann. Lye. Nat. Hist. New York, vol. 

 10, 1871, p. 112 [22] (type locality, Panama; type not extant;) 

 not Portunus (Portunus) acuminatus Rathbun, Proc. U. S. Nat. 

 Mus., vol. 38, 1910, pp. 538 and 577, pi. 49, fig. 4; not Portunus 

 (Portunus) acuminatus Rathbun, Bull. 152, U. S. Nat. Mus., 

 1930, p. 56, pi. 19. 



Type: Male, neotype. Cat. No. 391, Allan Hancock Foundation, 

 The University of Southern California, from Port Parker, Costa Rica, 

 5-10 fathoms; March 25, 1939; collected by Allan Hancock Expedition 

 of 1939 at Velero Station 936-39. 



Measurements: Male neotype: length of carapace 13.0 mm., width 

 including lateral spines 32.3 mm., length of lateral spine 5.8 mm., of 

 cheliped 42.0 mm., of chela 20.4 mm., of dactyl 9.4 mm., height of 

 manus at base of spine 2.6 mm. 



Color in life: Ground color of carapace ivory yellow overcast with 

 patches of light huffy brown, which take regular shape on gastric, car- 

 diac, and intestinal regions. All ridges and spines garnet brown, a spot 

 of the same color on cardiac, intestinal, and postbranchial areas. Chela 

 as carapace with bands of garnet brown on carpus, manus, and outer 

 surface of movable finger. Inner surface of movable finger and fixed 

 finger bright, mallow purple; tips light brown. Ambulatory legs like 

 carapace but lighter, banded with garnet brown. Dactjd vermilion with 

 tinge of blue. Ventral side light buff; eggs scarlet. (Petersen) 



Distribution: The 165 specimens from 16 Velero stations range from 

 Isabel Island, Mexico, to La Libertad, Ecuador, including the original 

 type locality. Bay of Panama. 



Remarks: A consideration of the several thousand specimens of Por- 

 tunus in the collections of the Allan Hancock Expeditions revealed the 

 presence of a distinctive species in relative abundance which could not be 



RAR Y 







