CLIPPERTON ISLAND DECAPODS—CHACE 625 
Ficure 3.—Calcinus explorator Boone, male with anterior carapace length of 5.0 mm,,. 
showing color pattern in preserved specimen, X 6.5: a, Anterior part of carapace in 
dorsal view; b, left cheliped; c, right cheliped; d, left third pereiopod. 
Cotor: The following description is based on notes made in the 
field by E.S. Reese. Entire carapace dark gray to greenish. Abdomen 
light to dark brown to gray. Eye scales white. Eyestalks black with 
narrow white band immediately proximad to cornea. Antennae, 
including scales, orange. Chelipeds black; fingers with white cutting 
edges and orange tips. Walking legs black, with proximal and distal 
thirds of dactyls orange. Mouth parts greenish, with deep red setae 
on maxillipeds. The darker colors change to orange in some pre- 
servatives, but the pattern persists for several years in most specimens, 
Remarks: Although constant morphological differences between this 
species and C. obscurus Stimpson from Central America could not be 
found, fresh material of the two forms can always be distinguished by 
the extent of the white band on the eyestalks and of the orange bands 
on the dactyls of the walking legs. In C. obscurus, the band on the 
eyestalk is much broader and the proximal band on the dactyls of 
the walking legs is very narrow, often incomplete or even absent, 
