. Diseases of metabolism and of the blood, animal parasites, toxicology. Constitutional diseases; Metabolism; Blood; Medical parasitology; Poisons. CESTODES 519 Eecently, in the CentralUatt f. Bad. und Parasit, 1902, Band xxxi, page 770, V. Linstow described a Tenia hominis n. spr. in the collection of helminthes of the Musee zoologique de 1'Academic Im- perial des sciences de St. Petersbourg. This tenia was found by Anger in a girl in Aschabad. The scolex was mm. long, mm. broad. The vertex contained a rudimentary but not prominent rostellum, mm. long, entering deeply into the
. Diseases of metabolism and of the blood, animal parasites, toxicology. Constitutional diseases; Metabolism; Blood; Medical parasitology; Poisons. CESTODES 519 Eecently, in the CentralUatt f. Bad. und Parasit, 1902, Band xxxi, page 770, V. Linstow described a Tenia hominis n. spr. in the collection of helminthes of the Musee zoologique de 1'Academic Im- perial des sciences de St. Petersbourg. This tenia was found by Anger in a girl in Aschabad. The scolex was mm. long, mm. broad. The vertex contained a rudimentary but not prominent rostellum, mm. long, entering deeply into the scolex, without hooks. The lumen of the suctorial discs extended antero-posteri- orly, so that they formed regular circles upon cross sec- tions. A ring-shaped promi- nence was noted behind the suctorial A B Fig. 44.—Tenia asiatica. (After v. Linstow.) 4, Tenia asiatica, natural size; B and C, schematic cross sections: B, with male, C, with female, sexual organs; g, vessel; n, nerve; h, testicles; va, vas deferens; c, cirrus bag; o, ovary; d, yolk sac; r, receptaculum seminis; v, vagina; D, cross section through a segment with masses of ova. The chain of the proglottides was 70 mm. long, mm. broad behind the scolex, mm. posteriorly. The sexual organs were not developed. Hymenolepis (drepanitotcenia) lanceolata, Block, a parasite found in many water-fowl, was re- cently expelled in two specimens by a boy twelve years old. The scolex was not found. The length of the tenia is 85-99 mm., its greatest breadth behind the center of the body length is mm. The proglottides are all consider- ably broader than long. The leaf-like thin stro- bila slightly tapers toward the anterior end; posteriorly it extends in uniform breadth and its termination is rounded. The ova possess the shells which are characteristic of the genus hy- menolepis, being far apart from each other. This parasite uses, as intermediate hosts, fresh water crabs; the cercocysts are found espe-.
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