. Bulletin - United States National Museum. Science. THE CANCROID CRABS OF AMERICA 163 Diagnosis.—Carapace distinctly longer than broad. Chelipeds very unequal. No segments of male abdomen fused. A spine on eye stalk. Description.—Carapace elongate-oval, covered with numerous well-separated, small, white, beadlike tubercles which posteriorly become subacute or spiniform. Surface between tubercles covered with very short, light-colored setae. Lateral teeth three besides the orbital tooth; two are antero-lateral, one postero-lateral. Lower sur- face of carapace spinulous. Median tooth of front o
. Bulletin - United States National Museum. Science. THE CANCROID CRABS OF AMERICA 163 Diagnosis.—Carapace distinctly longer than broad. Chelipeds very unequal. No segments of male abdomen fused. A spine on eye stalk. Description.—Carapace elongate-oval, covered with numerous well-separated, small, white, beadlike tubercles which posteriorly become subacute or spiniform. Surface between tubercles covered with very short, light-colored setae. Lateral teeth three besides the orbital tooth; two are antero-lateral, one postero-lateral. Lower sur- face of carapace spinulous. Median tooth of front oblong, twice as. Figure 25.—Peltasion dextr'jm, , holotype, dorsal view, X 'He long as lateral, which are divergent, each tooth tipped with a sharp spine and having two or more spinules near the tip. Cornea imper- fectly developed, light brown; a small spine on anterior or inner sur- face of eye stalk about one-third the distance from tip. Basal article of antenna attaining end of suborbital tooth, next two articles succes- sively much slenderer. Ischium of outer maxilliped wider distally than the merus, its antero-internal angle produced; inner angle of merus spinulous. Chelipeds very unequal, the right the larger (in the single specimen); surface finely granulate. Merus very thick, trigonal, spinulous on upper and outer margins and toward distal. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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