. Bulletin - United States National Museum. Science. 538 BULLETIN 54, UNITED STATES NATIONAL 'â 'Thorax: The pleural plates are very larg-e oval lanielhe, only con- nected with the segment b}^ somewhat less than the posterior half of their interior margin, and this result is due to the fact that they anteriorl}' are very much produced, highly overlapping each other, and posteriorly rather shortly produced. The legs are tolerably slender; the second joint not expanded; the fifth joint elongate, in the last pair as long as the hand. "Abdomen: It is turned to the left in a startling
. Bulletin - United States National Museum. Science. 538 BULLETIN 54, UNITED STATES NATIONAL 'â 'Thorax: The pleural plates are very larg-e oval lanielhe, only con- nected with the segment b}^ somewhat less than the posterior half of their interior margin, and this result is due to the fact that they anteriorl}' are very much produced, highly overlapping each other, and posteriorly rather shortly produced. The legs are tolerably slender; the second joint not expanded; the fifth joint elongate, in the last pair as long as the hand. "Abdomen: It is turned to the left in a startling degree and is pro- portionally smallâperhaps ver}" small. The dorsal surface is soft- skinned, the segments more or less dis tinctly separated. Pleural plates are not developed. The pleopods quite soft, of medium size, decreasing conspicuousl}^ in size from before l)ackward and at- tached to the lateral margin; each pleo- pod consists of a short peduncle and two lamellar oblong rami; the outer ramus much larger than the inner one. The uropods-biramous; the outer ramus a little smaller than the outer of the fifth pleopod, the inner ramus very short, almost rudimentary. The pleo- pods are curled to such a degree that it would have been impossible without much construction to draw a sketch of the abdomen. "(J) Ilale.âThe body is a little more than three times longer than broad, and from the fourth thoracic segment it decreases in breadth towards both ends. (Fig. 581/>.) " Head: The dorsal surface rather con- vex; the median portion of the anterior margin almost straight. No eyes. The frontal border bent slightly downwards (Fig. 581r^) The antennulas rather short, three-jointed; the basal joint tol- erably thick and partly overlapped by the rostrum; the second joint slender and rather short; the third ver}' small. The antennie com- parative! \" long, seven-jointed; the four proximal joints of about the same lengtli, but decreasing much in breadth from the
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
