. Alaska ... Natural history; Scientific expeditions. DECAPODS 75 spines in front of middle, tip acuminate, sometimes minutely bifid. An- terior margin of carapace armed with 3 spines, one supraorbital, one antennal, and one smaller, pterygostomian. Eyes large, pyriform. First two segments of antennules with an antero-external spine, third segment less than half as long as the second and armed with a spine at the middle of its anterior upper margin; the scale at outer base over- reaches the first segment. Outer flagellum reaching but little beyond the rostrum; inner flagellum twice as long. An
. Alaska ... Natural history; Scientific expeditions. DECAPODS 75 spines in front of middle, tip acuminate, sometimes minutely bifid. An- terior margin of carapace armed with 3 spines, one supraorbital, one antennal, and one smaller, pterygostomian. Eyes large, pyriform. First two segments of antennules with an antero-external spine, third segment less than half as long as the second and armed with a spine at the middle of its anterior upper margin; the scale at outer base over- reaches the first segment. Outer flagellum reaching but little beyond the rostrum; inner flagellum twice as long. Antennal peduncle extending nearly to the end of the second segment of the antennular peduncle. Scale oblong, tapering, shorter than the carapace, tipped with a small spine which is exceeded by the blade. Flagellum at least two thirds as long as the body. Tip of maxilliped intermediate between rostrum and antennal scale. Carpal joint of first pair of feet reaching end of antepenult segment of maxilliped. Second and fifth pairs of feet reaching about to end of rostrum. Abdomen ecarinate, third segment very prominent, its hinder portion extending well behind the line of the fourth segment. The sixth segment is about one and two thirds as long as the fifth, and seven ninths as long as the telson, which is armed with 5 or 6 spinules on each side. Dimensions.—K female, soft shell, measures about 79 mm. in length; a smaller female is 60 mm. long, carapace and rostrum mm,, rostrum mm. Distribution. —'^oxXh. of Unalaska, 277-351 fathoms, ^/-^^//vw stations 3315* 3330. ZZZ'i- (type locality). Variations.—\n the male the rostrum is slenderer and more sinuous, the antennal flagella considerably longer. In small specimens the rostrum is relatively shorter. SPIRONTOCARIS VICINA Rathbun. Spirontocaris vidua Rathbun, Proc. U. S. Nat. Mus., xxiv, 895, 1902. Allied to S. unalaskensis. J*ema/e. — FostenoT dorsal spine at anterior third of carapace. Ros- trum longer than the carap
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
