. Decapod crustaceans of the northwest coast of North America ... Crustacea -- North America. 66 RATHBUN SPIRONTOCARIS MURDOCHI Rathbun. Plate III, fig. 6. Hippolyte spinus Murdoch, Report Intemat. Polar Exped. to Point Barrow, Alaska, 140, 1885. Not Cancer spinus Sowerby. Spirontocaris tnurdochi KxTnBVH, Proc. U. S. Nat. Mus., XXIV, 893, 1902. Very near S. liljeborgii and S. spina. Female stout. Rostrum three fourths as long as carapace, not reach- ing tip of antennal scale. Carapace cristate, except on posterior fourth, and furnished with 3 or 4 large teeth. Midrib of rostrum nearly horizont
. Decapod crustaceans of the northwest coast of North America ... Crustacea -- North America. 66 RATHBUN SPIRONTOCARIS MURDOCHI Rathbun. Plate III, fig. 6. Hippolyte spinus Murdoch, Report Intemat. Polar Exped. to Point Barrow, Alaska, 140, 1885. Not Cancer spinus Sowerby. Spirontocaris tnurdochi KxTnBVH, Proc. U. S. Nat. Mus., XXIV, 893, 1902. Very near S. liljeborgii and S. spina. Female stout. Rostrum three fourths as long as carapace, not reach- ing tip of antennal scale. Carapace cristate, except on posterior fourth, and furnished with 3 or 4 large teeth. Midrib of rostrum nearly horizontal; tip acute; upper limb with convex upper margin, armed with 20 or 22 small irregular teeth ; lower limb, also with ,^]^- ^l:, spi'-ontocnrh mur- couvcx margin, deeper than the upper, and fur- dochi. Side of carapace of S & > r ffi (X if). Station 3650. nished with i to 4 small teeth near the extremity. Two supraorbital spines, one antennal, and one pterygostomian spine, all well developed. Eyes of moderate size, slightly pyriform, the width of antennular peduncle and half its scale. Antennular peduncle extending three fifths the length of the antennal scale; second segment twice as long as third; basal scale reaching nearly to end of second segment; thickened portion of outer flagellum reaching about to tip of antennal scale. Antennal peduncle reaching slightly beyond the first segment of the antennular peduncle; scale narrow-ovate, about as long as the rostrum, its spine reaching about as far forward as the blade. Outer maxillipeds rather broad and reaching nearly to tip of acicle. First pair of feet extending a little beyond antennal peduncle, the second pair beyond acicle, fifth pair nearly to tip of maxilliped; dactyli of last three pairs long and slender, that of last pair half as long as propodus. Abdomen not carinate; third segment produced well backward; fourth provided with a lateral spine; sixth three fourths as wide as long, and about three fifths as long a
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