. Bulletin - United States National Museum. Science. THE CANCROID CRABS OF AMERICA 255 ACTAEA BIFRONS Rathban Plate 104, Figures 3-6 Actaea bifrons Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 1898, p. 262, pi. 4, figs. 3 and 4 (type-locality, off Aspinwall [Colon], 34 fathoms; type, Cat. No. 7803, ); Bull. U. S. Fish Comm., vol. 20 for 1900, pt. 2 (1901), p. 34.—Odhner, Goteborg's K. Vet. Handl., Fjarde Foljden, vol. 29, No. 1, 1925, p. 50, pi. 3, figs. 12 and 12a. Diagnosis.—Carapace flattish, granulation sparse anteriorly; front steeply inclined; palm concealed by long t
. Bulletin - United States National Museum. Science. THE CANCROID CRABS OF AMERICA 255 ACTAEA BIFRONS Rathban Plate 104, Figures 3-6 Actaea bifrons Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 1898, p. 262, pi. 4, figs. 3 and 4 (type-locality, off Aspinwall [Colon], 34 fathoms; type, Cat. No. 7803, ); Bull. U. S. Fish Comm., vol. 20 for 1900, pt. 2 (1901), p. 34.—Odhner, Goteborg's K. Vet. Handl., Fjarde Foljden, vol. 29, No. 1, 1925, p. 50, pi. 3, figs. 12 and 12a. Diagnosis.—Carapace flattish, granulation sparse anteriorly; front steeply inclined; palm concealed by long thick hair; fingers long, smooth and punctate, not channeled. Description.—Compared to A. setigera, carapace narrower and flatter, areolations similar, but epigastric and postfrontal lobes sharply set off, sparsely granulate, marginal lobes more angular. Single hairs on carapace especially on side margins; like the remaining hairs, they are weak and colorless, not stiff and yellow as in setigera. Frontal. FiGUEE 41.—Actaea BIFRONS, MALE. a. Dorsal VIEW, 6. Fkont, lobes bent abruptly down, margins little advanced. Eyes larger; tooth at lower inner angle of orbit prominent. Chelipeds differ from those of setigera in the fingers longer in proportion to the palm, more strongly bent downward, and smooth, not channeled but with two rows of punctae on outer surface; in the immovable finger wider at base than the movable; in the granules of wrist and hand nearly concealed by thick hairy covering. Ambulatory legs tolerably hairy, especially the dactyls. Color.—Carapace above reddish orange; fingers faded brownish black (Henderson). Measurements.—Ovigerous female (53769), total length of cara- pace 7, width mm. Female, Spanish Water, length of carapace , width mm. Range.—Florida Keys to north coast of South America. To a depth of 40 fathoms. Material examined.—Western Dry Rocks, Key West, Florida; 25 fathoms; J. B. Henderson; 1 ovigerous female (537
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