. Alaska ... Natural history; Scientific expeditions. DECAPODS ^'J lo miles west of Point Franklin, 13^ fathoms, 3 3 (Point Barrow Expe- dition). Off Cape Sabine, 12 fathoms, i ? (W. H. Dall). 15 miles off Cape Krusenstern, 14 fathoms, i $ (W. H. Dall). Rakovaya Bay, Avacha Bay, Kamchatka, i $ {Albatross). Off Robben Island, east coast of Sakhalin, Okhotsk Sea, 28 fathoms, I ovigerous ? , type (Albatross station 3650). The species differs from S. liljeborgii in its lower carapace, shorter (in the ? ) and less ascending rostrum, smaller eyes, shorter spine of antennal scale (in S. liljeborgii t
. Alaska ... Natural history; Scientific expeditions. DECAPODS ^'J lo miles west of Point Franklin, 13^ fathoms, 3 3 (Point Barrow Expe- dition). Off Cape Sabine, 12 fathoms, i ? (W. H. Dall). 15 miles off Cape Krusenstern, 14 fathoms, i $ (W. H. Dall). Rakovaya Bay, Avacha Bay, Kamchatka, i $ {Albatross). Off Robben Island, east coast of Sakhalin, Okhotsk Sea, 28 fathoms, I ovigerous ? , type (Albatross station 3650). The species differs from S. liljeborgii in its lower carapace, shorter (in the ? ) and less ascending rostrum, smaller eyes, shorter spine of antennal scale (in S. liljeborgii the spine extends considerably beyond the blade), longer dactyH of third to fifth pairs of feet, longer abdomen, and stouter sixth segment. From S. spina it differs in the lower carapace and less ascending rostrum, in the lesser advancement of the lower Hmb of the rostrum, smaller eyes, shorter spine of scale, shorter and broader lobe of third abdominal segment, which is not carinated, longer dactyli of third to fifth pairs of feet (in S. spina the dactylus of the fifth pair is only one third length of propodus). SPIRONTOCARIS TRUNCATA Rathbun. Spirontocaris triincata Rathbun, Proc. U. S. Nat. Mas., xxiv, 894, 1902. Allied to S. spina. Median carina extending nearly to the posterior margin of the carapace, convex, and armed with 4 spines. Rostrum sub- triangular, widest at the extremity, about three fifths as long as the carapace, reaching end of second antennular segment, midrib curving upward as in S. spina, upper margin with i spine at its middle, extremity with 7 spines, 2 above and 4 below the midrib. Supraorbital spines 2, equal, large, one dta. 'kHr^X^:!"^, behind the other but scarcely above it, well sepa- <^ ^^^- ^'^"°" '^^^• rated. Anterior margin with 2 spines below the orbit as in S. spina. Antennular acicle reaching beyond the anterior margin of the second segment but not so far as the slender spine at the outer angle of that margin; a small spi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
