. Bulletin - United States National Museum. Science. 30 BULLETIN 129^ UNITED STATES NATIONAL MUSEUM. Fig. 8.—Achaeopsis thomsoni (18769), maxilliped, x reduced to a tubercle; one spine on each protogastric region; a slender spine above the orbit, and one at a little distance behind orbit. Subbranchial and pterygostomian regions each armed with a spine; lateral margin of hepatic and branchial regions with a few spinules. Rostrum upturned; horns longer than interorbital width, slightly divergent. Eyestalks with some sharp granules in front and a tubercle above at emargination of cornea. Bas
. Bulletin - United States National Museum. Science. 30 BULLETIN 129^ UNITED STATES NATIONAL MUSEUM. Fig. 8.—Achaeopsis thomsoni (18769), maxilliped, x reduced to a tubercle; one spine on each protogastric region; a slender spine above the orbit, and one at a little distance behind orbit. Subbranchial and pterygostomian regions each armed with a spine; lateral margin of hepatic and branchial regions with a few spinules. Rostrum upturned; horns longer than interorbital width, slightly divergent. Eyestalks with some sharp granules in front and a tubercle above at emargination of cornea. Basal antennal article with two rows of spinules and an outer terminal spine; first movable article half as long as second. Three rows of spines on maxil- lipeds. Chelipeds of male: Merus armed on mar- gins with numerous spines; carpus narrow, spinous, the spines of upper inner margin longest; manus swollen, very narrow at base, upper margin armed for its proximal two- thirds with a few long spines and several spinules; fingers longitudinally sulcate, thin at the margins; teeth of cut- ting edges irregular, so that the fingers though not gaping do not fit even- ly^together at base. Chelipeds of female much more slender; armature similar to that of male except that in the manus the spines are con- tinued to the fingers, which fit together more closely. The ambulatory legs diminish gradually in length from first to last pair; they are furnished with long straight hairs as well as tufts of curled hair on upper surface; a terminal spine on the merus; first, dactylus straight except at tip, the remainder more curved, diminish- ing in length but similar to one another; a fringe of hairs on lower margin, also a few distant spinules pointing toward the propodus, and a larger spinule near the tip. Color.—Reddish white (A. Milne Edwards and Bouvier). Measurements.—Male (18119), median length of carapace , length to tips of rostrum , width of carapace mm. Range.—Western A
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
