. Bulletin - United States National Museum. Science. 112 BULLETIN 129, UNITED STATES NATIONAL MUSEUM DescHption.—Carapace covered with curved hairs and coarse granulation except in the deep interregional furrows which are smooth; granules less numerous on gastric and frontal regions. Spines of gastric and cardiac regions stout, spine of first abdominal segment slenderer. Rostrum narrow, advanced, hood-shaped, edge arcuate, a median keel, and a very short, closed, median incision at the end in the male. In the female the rostrum is narrower and without incision. In the type male described by Ed
. Bulletin - United States National Museum. Science. 112 BULLETIN 129, UNITED STATES NATIONAL MUSEUM DescHption.—Carapace covered with curved hairs and coarse granulation except in the deep interregional furrows which are smooth; granules less numerous on gastric and frontal regions. Spines of gastric and cardiac regions stout, spine of first abdominal segment slenderer. Rostrum narrow, advanced, hood-shaped, edge arcuate, a median keel, and a very short, closed, median incision at the end in the male. In the female the rostrum is narrower and without incision. In the type male described by Edwards the ros- trum was more pointed and not incised. Basal antennal article long and narrow, inner lamina not deep, subentire, ending in a lobe, outer margin obscurely denticulate, terminal lobe elongate. Postorbital lobe large, advanced, its margins parallel in basal half, its inner margin then becoming transverse. Male sternum and female abdo- men covered with fine Fig. 34.—Collodes rostratus. o. Rostrum of female (21865), X 6. Rostrum of male (21864) X c. Left chela of male (21864), X Chelipeds feeble, merus and carpus and upper surface of manus finely roughened, fingers gaping for two-thirds their length, basal two-fifths of fixed finger hollowed on its prehensile edge in male. Variation.—Three small specimens, one of which is from the type- locality, differ from t3rpical rostratus in having the rostrum split for a short distance into two small .horns. As the other characters are so close to rostratus, it is very probable that the bifid form is the early form and that the horns disappear with age leaving an entire rostrum, which may show slight indication of a bilobed tip. Measurements.—Male (21864), length of carapace , width , length of cheliped 12, length of first ambulatory leg 20 mm. Female (21865), length of carapace , v/idth 9 mm. Male (2049), length , width mm. Female (2057), length 7, width mm. Range.
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