Harriman Alaska series . s in P. vulgaris with equal carapace; the rostral teeth are fewer, theacicle larger, the chelipeds of the second pair more slender. From Leach it differs in its longer rostrum, shorter feet of the secondpair, in which the relative length of the segments also is quite different. Genus Urocaris INFRASPINIS Rathbun. Urocaris infraspinis RATHBUN, Proc. U. S. Nat. Mus., xxiv, 903, 1902. Closely allied to U. longicaudata Stimpson of the West Indian region. Carapace and rostrum equal in length to the first three segments andhalf of the fourth segme
Harriman Alaska series . s in P. vulgaris with equal carapace; the rostral teeth are fewer, theacicle larger, the chelipeds of the second pair more slender. From Leach it differs in its longer rostrum, shorter feet of the secondpair, in which the relative length of the segments also is quite different. Genus Urocaris INFRASPINIS Rathbun. Urocaris infraspinis RATHBUN, Proc. U. S. Nat. Mus., xxiv, 903, 1902. Closely allied to U. longicaudata Stimpson of the West Indian region. Carapace and rostrum equal in length to the first three segments andhalf of the fourth segment of the abdomen. Rostrum not reachingend of second antennular segment, convex above, armed with 5 to 7teeth above, i or 2 small teeth below near tip, tip acuminate; behind therostrum a median gastric spine. Suborbital angle blunt. Antennal andhepatic spines of good size. Eyes two thirds as long as first antennular RATHBUN segment, a minute black ocellus above and toward the outside, and be-yond the limit of the FIG. 10. Urocaris infraspinis. 9 (X si)- Locality unknown, a. Side. b. Dorsal view of anterior portion. Antennular peduncle nearly as long as carapace, exclusive of rostrum;first segment broad, its thin outer margin armed with a spine on the basalportion and another at the extremity; the inner angle of the lateral ex-pansion is advanced beyond the articulation of the second joint; secondand third segments subequal and together nearly equal to the first. Theacicle is oblong, extremity oblique, produced at inner angle away beyondouter spine, which is in line with end of antennular peduncle. The an-tennal peduncle scarcely reaches end of first antennular segment; fla-gellum as long as body. The outer maxillipeds extend to the middle of the last joint of the an-tennal peduncle. The first pair of feet reach ihe spine of the acicle;merus, carpus, and propodus subequal, palm and fingers subequal. Thesecond pair of feet are as long as the distance from the end of the
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