54 
Tapeworm from a Parakeet 
part of the uterus still persists, the more anterior narrow duct increases 
in length and gives off many outgrowths. These latter increase in size 
until in segments nearly ready for detachment, the uterus is a deeply 
lobed organ, filling nearly the entire proglottis. In older segments, 
these outgrowths assume a moniliform appearance, and gradually 
become constricted into isolated pockets each containing several ova. 
Specific diagnosis. 
Cotugnia: 75 mm. long by 2 mm. broad. Head: 0-42 mm. in 
diameter, 0-45 mm. long, with retractile rostellum 0-15 mm. in diameter, 
armed with a crown of numerous hooks arranged in a double row. 
Hooks as in Text-fig. 1, 0-012 mm. long. Suckers oval, unarmed, 
0-081 mm. in diameter. Neck absent. Segments trapezoidal and 
imbricate. Genital organs double in each segment, genital pore 
situated at the anterior third of the lateral margin. Male and female 
canals pass dorsal to the excretory system. 
Musculature : Three longitudinal muscle layers alternate with 
three transverse layers. 
Male genitalia : Testes numerous in a double row, occupying the 
centre of the proglottis and extending laterally beyond the excretory 
canals. Cirrus pouch not reaching the longitudinal excretory canal. 
Female organs: Yolk-gland posterior to ovary. Keceptaculum 
seminis spherical. Ovary strongly lobed. Yolk-gland compact, little 
lobed. No persistent uterus present. Eggs enclosed in paren¬ 
chymatous capsules, each containing several eggs. Egg has three 
membranes. 
Life history: Unknown. 
Host: Brotogerys tirica. 
Locality: Brazil. 
REFERENCES. 
(1) Child, C. H. (1907). Development of the Spermatogenesis in Monezia. Biol. 
Bull. Woods Roll, XII. 175-191. 
(2) Diamabe, V. (1893). Note su Cestodi. Boll, della Soe. di Natur. in Napoli, 
Ser. 1, vn. 10. 
(3) Fuhemann, 0. (1909). Neue Davaineiden. Central, f. Baht. u. Parasitenh., 
1 abt., XLix. 116. 
(4) VON Linstow (1890). Beitrag zur Kenntniss der Vogeltaenien nebst Bemer- 
kungen liber neue und bekannte Helminthen. Arch. f. Nahirgesch. Jahrg. 56, 
vol. I. (quoted from M. Braun in H. G. Bronx’s Klassen und Ordnungen des 
Thier-Reichs, p. 1404). 
