. Bulletin - United States National Museum. Science. 10 BULLETIN 140, UNITED STATES NATIONAL MUSEUM length). The dorsal ray split at its tip into 4 digitate processe,-', the 2 external ones being the most prominent. Spicules short, strongly chitinized. with thickened edges, crossing each other when extruded, according to Shipley, so that the right spicule projects to the left and vice versa. Gubernaculum in profile is the shape of a Turkish slipper. Female 8 to 10 mm. long. Tail rather sharply pointed at tip. Vulva (fig. 4) y5 to yQ of body length from posterior end, the vulva a transverse sli
. Bulletin - United States National Museum. Science. 10 BULLETIN 140, UNITED STATES NATIONAL MUSEUM length). The dorsal ray split at its tip into 4 digitate processe,-', the 2 external ones being the most prominent. Spicules short, strongly chitinized. with thickened edges, crossing each other when extruded, according to Shipley, so that the right spicule projects to the left and vice versa. Gubernaculum in profile is the shape of a Turkish slipper. Female 8 to 10 mm. long. Tail rather sharply pointed at tip. Vulva (fig. 4) y5 to yQ of body length from posterior end, the vulva a transverse slit with crenelated edges. Eggs 72 to 75/t long by 46^ wide, in the morula stage as passed by host. Life history.—According to Leiper, the embryo may develop and the eggs hatch in 36 to 48 hours after the eggs leave the bird, or under unfavorable conditions in summer hatching may require a month. The young first-stage larva is 360^ long by 15/a wide, and has an esophageal bulb and a cylindrical buccal capsule. In 4 or 5 days it may molt to form a second-stage larva 46G> long, which. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
