Harriman Alaska series . he nearest approach in the Pacific to the <£ gaimardii ofthe Atlantic. Associated with S. townsendi, with which it may easily beconfounded; distinguished from it as follows: The rostrum is rather more concave above instead of nearly straight;it reaches end of, or may exceed, antennal scale. The antennular scale does not reach the end of the second segment ofthe peduncle. The antennular peduncle reaches middle of antennal scale (lengthmeasured along outer margin). The second segment is appreciablylonger than the third. The antennal scale, measured on its outer margin
Harriman Alaska series . he nearest approach in the Pacific to the <£ gaimardii ofthe Atlantic. Associated with S. townsendi, with which it may easily beconfounded; distinguished from it as follows: The rostrum is rather more concave above instead of nearly straight;it reaches end of, or may exceed, antennal scale. The antennular scale does not reach the end of the second segment ofthe peduncle. The antennular peduncle reaches middle of antennal scale (lengthmeasured along outer margin). The second segment is appreciablylonger than the third. The antennal scale, measured on its outer margin, is much shorter thanthe carapace. The outer maxillipeds overlap the distal fourth of the antennal scale,and may reach the end of the scale. The second pereiopod is commonly destitute of an epipod; sometimes RATHBUN it is furnished with a rudimentary epipod, or with a fully developed last pair of pereiopods reach the end of the antennal scale. The fourth abdominal segment is provided with a spine on either side. FIG. 38. Spirontocaris suckleyi. 9 (X 25)- Station 3334. a. Side. 6. Dorsal view of anterior portion. below. The sixth segment is a little shorter and broader than in Male.—As in S. townsendi, the male resembles the female, except forbeing smaller, more slender, and with longer antennules. S. suckleyi differs from S. gaimardii in the fewer dorsal spines, 5 or 6against 7 or 8 in S. gaimardii; in the larger eyes; in the antennularpeduncle of the female reaching middle of antennal scale; in the absenceof hook or hump on the third abdominal segment in the male; in theslightly shorter sixth segment; and in the absence usually of an epipodfrom the second pereiopod. Variations.—In about three hundred specimens examined only onelacks the spines on the fourth abdominal segment; in another specimenthe spine is present on one side, absent on the other. Dimensions.—Length of $ (station 2864) approximately 79 mm.,length of carapace and rostrum mm.,
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Keywords: ., bookauthormerriamc, bookcentury1900, bookdecade1900, bookyear1904
