. Digest of comments on The pharmacopia of the United States of America and on the National formulary ... 1905-1922. Fig. 16.—Eggs of Old World hookworms(Agchylostoma duodenale) as found in thestools. Greatly enlarged. (After Stiles,1902b, i». 193, fig. Figs 17-29.—Embryology of the old World hookworm [Agchylostomaduodenal* i oi man; 17-23, seg-mentation of the egg, 21 -26, the embryo; 27, a rhabditiform embryo escaping from its eggshell; 28 29,empty eggshells. Greatly enlarged. (After Ierroneito. 1882, ]>. 342, tif,. 1 12.) of the adult hookworm. This embryonal esophagus is more or
. Digest of comments on The pharmacopia of the United States of America and on the National formulary ... 1905-1922. Fig. 16.—Eggs of Old World hookworms(Agchylostoma duodenale) as found in thestools. Greatly enlarged. (After Stiles,1902b, i». 193, fig. Figs 17-29.—Embryology of the old World hookworm [Agchylostomaduodenal* i oi man; 17-23, seg-mentation of the egg, 21 -26, the embryo; 27, a rhabditiform embryo escaping from its eggshell; 28 29,empty eggshells. Greatly enlarged. (After Ierroneito. 1882, ]>. 342, tif,. 1 12.) of the adult hookworm. This embryonal esophagus is more or lessbottle shaped, and consists of three parts—an anterior elongated 25 swollen portion, followed by a thin middle portion, the latter beingfollowed )>v a more or less globular esophageal bulb which possesses atriradiate chitinous armature. This kind of esophagus is common tothe early stage of all members of the family Strongylidae and also tonumerous other free-living or parasitic nematodes. It is evidently aworm with an esophagus of this sortwhich was recently found in the earthtaken from the New York tunnel ex-cavations, and upon which was basedthe report that uncinariasis waspresent. The embryo of the hookworm livesin water or moist ground.
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