. Alaska ... Natural history; Scientific expeditions. 152 RATHBUN maxillipeds reach to the end of the antennal peduncle. The cheh'peds are unequal, the longer one in the male nearly as long as the body; setose; its inner surface and also the outer surface of carpus and manus covered with sharp granules or short spines; upper margin spinose, also lower inner margin of merus; lower outer margin of merus outlined with very short blunt spines and a single longer distal spine; lower margins of propo- dus armed with dentiform granules. Margins of pro- podus sub-parallel. Fin- gers shorter than palm
. Alaska ... Natural history; Scientific expeditions. 152 RATHBUN maxillipeds reach to the end of the antennal peduncle. The cheh'peds are unequal, the longer one in the male nearly as long as the body; setose; its inner surface and also the outer surface of carpus and manus covered with sharp granules or short spines; upper margin spinose, also lower inner margin of merus; lower outer margin of merus outlined with very short blunt spines and a single longer distal spine; lower margins of propo- dus armed with dentiform granules. Margins of pro- podus sub-parallel. Fin- gers shorter than palm in adult males, just as long as palm in smaller males and in females; usually slightly gaping at base; occludent edges finely and irregularly dentate. The stouter cheliped may be longer or shorter than the slenderer one. In the fe- male the chelipeds are two thirds as long as the body. The second pair of feet are a little stouter and shorter than the last three pairs; the first four joints have a few spines on lower mar- gin ; the carpus a few spines toward the distal end; mar- gins long-setose. Meral joints of third and fourth pairs of legs with an infero-distal spine; last three pairs more or less setose, especially so on the dactylus and distal end of the propodus. Abdomen almost smooth; there are a few setae on the sides and on the swimming-fan. The pleura behind the first, which is subacute and armed with a spine, are rounded and decrease in length from the second to the fifth, the anterior margin of the third, foiurth, and fifth, and lower margin of sixth, being armed with a small spine. Telson subquadrangular, broadly rounded behind, a median groove, a few lateral and one median marginal spine, 2 larger dorsal spines. Inner branch of caudal swim-. FiG. 91. Calastacus guinqueseriatus. i (X about |). Station Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
