. Bulletin - United States National Museum. Science. THE GBAPSOID CRABS OF AMERICA. 55 gers long and slender, third pair of legs longest, dactylus of last pair recurved. Abdomen of male much narrower at base than the sternum; third to fifth segments fused. Restricted to America and the Philippine Islands. Analagous species on opposite sides of the continent: typicus (Atlantic); Jatipes (Pacific). KEY TO THE AMERICAN SPECIES OF THE GENDS CHASMOCARCINOS. A\ Orbits transverse in dorsal view. Carapace strongly narrowed anteriorly. typicus, p. 55. A*. Orbits oblique in dorsal view. B\ Orbits direct
. Bulletin - United States National Museum. Science. THE GBAPSOID CRABS OF AMERICA. 55 gers long and slender, third pair of legs longest, dactylus of last pair recurved. Abdomen of male much narrower at base than the sternum; third to fifth segments fused. Restricted to America and the Philippine Islands. Analagous species on opposite sides of the continent: typicus (Atlantic); Jatipes (Pacific). KEY TO THE AMERICAN SPECIES OF THE GENDS CHASMOCARCINOS. A\ Orbits transverse in dorsal view. Carapace strongly narrowed anteriorly. typicus, p. 55. A*. Orbits oblique in dorsal view. B\ Orbits directed obliquely forward and outward. Merns joints of legs broad httipes,\).57. B*. Orbits directed obliquely backward and outward. Merus joints of legs narrow. C\ Carapace narrow, not mucli broader than long obliqmis. p. 58. C. Carapace broad, much broader than long cylindricus, p. FlO. 23. CHASMOCAKCINDS TTPICUS, MALE a, DOUSAL VIEW, X 2 ; b, AB- DOMEN AND STEItXUM, FLATTENED, X 2. CHASMOCARCINUS TYPICUS Rathbun. Chasmocarcinns typicus Rathbttn, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 1S9S, p. 285, pi. 7, figs. 3-5 (type-locality, north of Trinidad, 31 to 34 fathoms, stations 2121 and 2122, Albatross; male holotype, Cat. No. 6901, ). Diagnosis.—Orbits transverse. An antero-lateral marginal line. Sternum and abdomen granulate. Description.—Carapace a little more than three-fourths as long as broad. Upper surface convex, rounding gradually downward into the nearly perpendicular lateral surfaces. Anterior third strongly deflexed. Lateral outline as seen from above convex and slightly emarginate at its middle where a sulcus arises which extends. 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 Int
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