. Bulletin - United States National Museum. Science. THE SPIDER CRABS OF AMERICA 351 THOE PANAMENSIS Nobili Plate 125, figs. 5 and 6 Thoe erosa A. Milne Edwards, Crust. R6g. Mex., 1875, pi. 19, figs. 4-4d; 1878, p. 121 (not synonymy).—Rathbun, Mem. Mus. Comp. Zool., vol. 35, 1907, p. 74 (not all synonymy). Not T. erosa Bell, 1836. Thoe panamensis Nobili, Boll. Mus. Zool. Anat. Comp. R. Univ. Torino, vol. 16, No. 415, 1901, p. 30 (type-locality, Isola Flamenco, Bay of Panama; tj^pe in Mus. Turin).—Rathbun, Proc. U. S. Nat. Mus., vol. 38, 1910, pp. 575 and 618; the locality "Ecuador" i
. Bulletin - United States National Museum. Science. THE SPIDER CRABS OF AMERICA 351 THOE PANAMENSIS Nobili Plate 125, figs. 5 and 6 Thoe erosa A. Milne Edwards, Crust. R6g. Mex., 1875, pi. 19, figs. 4-4d; 1878, p. 121 (not synonymy).—Rathbun, Mem. Mus. Comp. Zool., vol. 35, 1907, p. 74 (not all synonymy). Not T. erosa Bell, 1836. Thoe panamensis Nobili, Boll. Mus. Zool. Anat. Comp. R. Univ. Torino, vol. 16, No. 415, 1901, p. 30 (type-locality, Isola Flamenco, Bay of Panama; tj^pe in Mus. Turin).—Rathbun, Proc. U. S. Nat. Mus., vol. 38, 1910, pp. 575 and 618; the locality "Ecuador" is an error. Diagnosis.—-Very near T. sulcata. Outer row of excavations on arm obsolete or obsolescent. Merus of ambulatory legs entire or obscurely spinulous above. Description.—Panama specimens differ from more northern ones in the above characters chiefly. However, the obsolescence of the outer row of excavations on the arm is not altogether constant. The old male in panamensis has widely gaping lingers, as in sulcata, but the tooth on the dactyl at the middle of the gape is broader than long, its edge tridentate or tricrenulate. On the merus of the legs no spines or spinules show among the marginal hairs, nor is there a spine on the posterior surface near its proximal end. Perhaps not specifically distinct from sulcata. Measurements.—Male (48786), length of carapace , wddth of same mm. Range.—Bay of Panama. Material examined.— Taboguilla Island; between tide-marks; October 31, 1899; Alhatross; I male (7072, M. C. Z.). Taboga Island; June, 1914; J, Zetek; 1 male, 1 female (48786). ^ ^ PANAMENSIS, FE- Perico Island; October 26, 1904; Albatross; 1 male male (48786), ba- (33390). "''" Panama; May, 1863; Dr. Sternberg; 2 males, 2 females (1945, M. C. Z.). Panama; A. Agassiz; 3 ovigerous females (988, M. C. Z.); identified by Stimpson as T. sulcata. THOE EROSA BeU Plate 249, figs. 1-6 Thoe erosa Bell, Proc. Zool. Soc. London, vo
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